Luck-based medicine: My resentful story of becoming a medical miracle

You know those health books with “miracle cure” in the subtitle? The ones that always start with a preface about a particular patient who was completely hopeless until they tried the supplement/meditation technique/healing crystal that the book is based on? These people always start broken and miserable, unable to work or enjoy life, perhaps even suicidal from the sheer hopelessness of getting their body to stop betraying them. They’ve spent decades trying everything and nothing has worked until their friend makes them see the book’s author, who prescribes the same thing they always prescribe, and the patient immediately stands up and starts dancing because their problem is entirely fixed (more conservative books will say it took two sessions). You know how those are completely unbelievable, because anything that worked that well would go mainstream, so basically the book is starting you off with a shit test to make sure you don’t challenge its bullshit later?

Well 5 months ago I became one of those miraculous stories, except worse, because my doctor didn’t even do it on purpose. This finalized some already fermenting changes in how I view medical interventions and research. Namely: sometimes knowledge doesn’t work and then you have to optimize for luck.

I assure you I’m at least as unhappy about this as you are. 

Preface to the Preface

I’ve had nonspecific digestive issues since before I have memories. In pre-school my family joked that I would die as a caveman because there were so few things I would eat, and they were mostly grains. This caused a bunch of subclinical malnutrition issues that took a lot of time to manage and never got completely better. And while I couldn’t articulate this until it went away, food felt gross all the time

It’s hard to convey just how bad this was for me, because it feels like it undermines everything I did to work around it. I’ve always been functional but decidedly less healthy than my friends. I got sick more often and it hit me harder. I was slower to heal from injuries and scrapes and that limited my interest in the more athletic sort of hobbies.  I couldn’t work the same hours, and working hours traded off really sharply against energetic hobbies. I had to spend a lot of time managing food where other people can just show up and eat, which was a constant source of social stress. My genetics say I was destined to have anxiety issues, but the low level malnutrition and justified feelings of food insecurity despite apparent abundance did not help anything.

Eventually in my late 20s. I saw a nutrition-focused psychiatrist who listened to my observations (I could only eat protein with soda), immediately formed a hypothesis (I produced insufficient stomach acid), asked questions to rule it out (which I no longer remember), suggested a test (take stomach acid pills and see if they gave me heartburn), and when it came back positive (no heartburn) suggested a course of action (keep taking stomach acid pills) that showed immediate benefits in practice (indigestion removed, but only when I took the pills). My protein and produce intake increased enormously, and I felt overall much better. 

This is exactly how I want medicine to work. I gathered good data and took it to an expert who immediately formed a model, definitively tested it, and prescribed a course of action that made mechanistic sense.  If you forget that it took almost 30 years and I took those exact same symptoms to other doctors beforehand, it’s a stunning success. 

But it was not a total success. My protein intake maxed out at 50 grams/day, and that was if I made consuming protein a hobby and nothing went wrong. I was doing much better than I had been, but my nutrient tests showed I still had a lot of issues. Eventually the stomach acid pills stopped working, although that seems to be “my stomach started producing more acid and a different problem became the bottleneck”  rather than the pills ceasing to contain acid. But the problem was not solved, and more of the existing treatment did not help.

Standard Preface

I worked with a number of doctors on fixing the remaining digestive, for ~another decade. I had a lot of conversations like the following:

Me (over 20 pages of medical history and 30 minutes of conversation): I can’t digest protein or fiber, when I try it feels like something died inside me. 

Them: Oh that’s no good, you need to eat so much protein and vitamins

Me: Yes! Exactly!. That’s why I made an appointment with you, an expensive doctor I had to drive very far to get to. I’m so excited you see the problem and for the solution you’re definitely about to propose.

Them: What if you took a slab of protein and chewed it and swallowed it. But like a lot of that.

Me: Then I’d feel like something died inside me, and would still fail to absorb the nutrients which is the actual thing we want me to get from food.

Them: I can’t help you if you’re not willing to help yourself.

Or sometimes…

Me (over 20 pages of medical history and 30 minutes of conversation): I can’t digest protein or fiber, when I try it feels like something died inside me. If I make it my top priority I can get maybe 50 grams of protein a day.

Them: Oh that’s no good, you need 70 minimum, and really more like 100. Also because I’m a naturopath I’m morally obligated to tell you to give up eggs, dairy, and wheat.

Me: That’s gonna be hard seeing as those three are 90% of my protein intake and by far the easiest forms of protein to digest.
Them: What if you ate pea protein?

Me: Well that’s harder so…worse.

Them: What about hemp?

Me: That is even harder than pea protein.

Them: If you’re not going to try why are you even here?

These exchanges were incredibly draining for me, so I didn’t have them that often. Every year or two I’d get my hopes up for a new doctor, pay a shitton of money (these doctors are never covered by insurance) for several emotionally draining appointments, and then get told they couldn’t help me and this was a failure on my part.

After several years of that pattern I gave up and went back to my old PCP. She hadn’t solved the problem either, but she had solved other problems, had ideas to try for this one, and believed it was a physical rather than moral problem. Unfortunately she is very busy, and sometimes pawns me off on her assistant doctors, who are idiots. That second conversation was with one of those, although in the real conversation I was less witty, and was more like “*sob* no *sob* I told you *sob* I CAN’T”. 

I refused to see that doctor again, but this left me little leverage when they assigned me a different sub-doctor to handle a post-covid rash back in April. You know how naturopaths complain about western medicine being mechanical and reactive and not taking the time to reach a systemic understanding? Well this guy, who we will call Dr. Spray-n-pray, was determined to fight for equality by taking the same approach with unregulated supplements. He guessed I had an allergic reaction and threw 5 different antihistamines of varying legitimacy at me, with no mention of testing the hypothesis, monitoring my progress, expected changes, duration of treatment… 

And it worked.

Not on the rash; I eventually had to go to urgent care for that. But shortly after I started the pills, I found myself eating 50 grams of protein in a sitting and then going back for more the next meal. I also started chowing down on produce, and at some point realized I couldn’t remember the last time I’d had dessert. I had known I had some aversion issues with food but didn’t realize how gross I found it until the feeling went away and I could just eat without feeling contaminated. About here is when I started a food diary and found I was regularly hiting 100g of protein/day. When I crashed my scooter I ate 350 grams of protein over two days, suggesting I could do that any time I wanted but chose not to, suggesting my body was getting all the protein it felt it needed, all of the time.

I’m not sure I can convey what a big deal this is either. I would have paid several years’ salary for this cure without thinking. It is now possible for me to feel okay at an emotional level it wasn’t before. Plus, you know, I can actually get the nutrients I need to run my body and stuff.  My injuries after that scooter accident healed noticeably faster than past injuries. The fact that I haven’t caught an illness since April’s covid isn’t conclusive, since it’s summer and I haven’t done anything high risk, but it is interesting. 

[I do have covid antibody results from the December (8 months after my vaccine) and August (4 months after catching covid)  and my levels have gone way up, but that’s more likely due to the more recent and stronger immune stimulus.]

But that evidence came later. Back in May the timing of the miracle suggested that one of Dr. Spray-n-pray’s pills was responsible. This was more or less confirmed when I weaned off the various pills and the subtle grossness around food started to return. I could also feel growing sugar cravings. So it was important to figure out what the miracle pill was and get back on it immediately.

[If any of you are thinking “well it could have been a coincidence”: no it fucking couldn’t. I did not carry this around for 35 years and try everything to fix it only to have it suddenly go into remission for no reason. I’ll believe covid fixed it before I believe that.]

I had always assumed the reason doctors turned on me was that it was easier than accepting that they couldn’t solve my problem. But this one had fixed my problem! Not on purpose or anything, but I was fully prepared to pretend it was. Now we just had to figure out what had worked and why, in case it suggested any additional actions. I made a spreadsheet tracking the changes as best I could – when my diet changed (using grocery order data), when I’d started and stopped which pills. Surely my data plus his doctor ego would help us get to the bottom of this.

At the time of my follow-up appointment I had a strong guess which supplement had helped based on timing, but it didn’t make any sense. The active ingredient was Boswelia (specifically BosPro brand (affiliate link). I’m afraid to try another in case it breaks the spell). Boswelia is sometimes described by alt medicine websites as helping digestive issues, but in the same way they describe every supplement as helping digestive issues. “Helps anxiety, allergies, autoimmune disorders, inflammation, and digestion” should just be a stamp. This isn’t even necessarily illegitimate – the body is complicated and lots of things are entangled, especially with inflammation.

But I’ve tried a lot of these supplements at one point or another and there was absolutely no reason to predict this one would be different, even if I had researched it ahead of time. Examine.com is pretty positive on Boswelia but doesn’t list digestion as an issue it solves. Everything is connected to everything else in the body and it was still pretty hard for me to make a causal chain between Boswelia’s alleged mechanisms and improvements in my digestion. So I was extremely excited for Dr. Spray-n-pray to explain why it had worked.

All this was on my mind when I finally got to ask Dr. Spray-n-pray why his treatment had worked. He mumbled something about inflammation and moved on. He had zero interest in my spreadsheet or a more mechanistic understanding of what had changed. I confirmed the miracle was from BosPro when I resumed taking it and the digestive improvements returned (including the creeping feeling of grossness going away). It’s now 5 months since I started taking it and it still works but I have no idea why.

This is not how I want medicine to work, at all. A medic who clearly was not trying for a systemic understanding recommended a lot of stuff and one of them happened to fix a problem as unrelated as could be that I’d spent a decade+ searching for without success? Even knowing definitively that it works we have no idea why, and what would help or hinder it? And there’s ~0 evidence this would help other people with the same condition?

This is bullshit. But bullshit is working where logic feared to tread.

Other Evidence

This experience isn’t what got me on the path of luck-based medicine though. I was already at that point when the supplements were prescribed, which is why I took them instead of doing 5 hours of research and ignoring Dr. Spray-n-pray’s suggestions as the ravings of an idiot. There were a lot of contributors to my shift, but a few stand out.

A few years ago I ran a series of epistemic spot checks on various self-help books, and found that how helpful they were had no correlation with how rigorous or true their theoretical backing was.

Then last year I ran that ketone ester study. I and a handful of people I know get insane gains from using ketone esters – better than Ritalin with none of the side effects – but when I ran an RCT (n=8-12 depending on how you count) no one reported any benefits. 

Or take Slime Mold Time Mold’s all-potatoes-all-the-time diet study (which happened after I started on the magic pills, but is too good an example to pass up). I have an extremely long list of complaints about their hypothesis and follow up study:

  • They failed to contextualize it as a monodiet and discuss the classic monodiet problems.
  • Potatoes aren’t nutritionally complete and don’t have enough protein for people to thrive. They gestured at some of the nutritional deficiencies but I think not hard enough, and believe potatoes have more protein than reported but have not pointed to any evidence to that effect.
  • They tracked weight loss over 28 days but will not be doing a follow-up for six months. Since the default after rapid weight loss caused by an unsustainable diet is immediate regain, this is unconscionable.
  • I haven’t had time to dig into the object-level facts in the argument between SMTM and a persistent critic, but with my monkey social brain it sure does look like SMTM is blowing off well-founded criticism (given in a super aggressive manner).
  • They treat weight loss as an unalloyed good no matter how fast or what the person’s starting weight was.
    • I have not looked into the popular “weight loss not safe above 2 pounds per week” claim and it wouldn’t shock me if it were made up, but if I had an intervention with double that impact I’d spend an hour investigating the claim.
    • Weight loss beyond a certain body fat percentage is bad. You need that stuff.
  • They did warn people about solanine poisoning but I think they should be more concerned about it.
  • Analysis featured a lot of stories along the lines of “Did X on Wednesday and lost 2 pounds on Thursday” and fat loss does not work like that. Two pounds overnight is either water weight or has a lookback period longer than 24 hours.
    • I’m deeply confused about that second part, I don’t understand why or how weight-loss-that-is-definitely-not-changes-in-water-retention comes in chunks. If you have an answer I’m quite curious.

That’s a lot of epistemic sins. OTOH, their potato diet results inspired me to try the minimal potato diet, which consists of eating some potatoes every day (I started with ~100g of baby potatoes), and I’ve lost 15 pounds in 3 months. That level of weight loss with zero sacrifices buys you a lot of epistemic forgiveness, especially when my miraculous dramatic dietary improvements did fuck all to the number on the scale.

[ People already writing their “potatoes can’t possibly be the cause it must be psychosomatic” comments in their head: I see you. Your hypothesis is perfectly reasonable; in your position it would be my first reaction too. But in this particular case you’re going to need to explain why potatoes caused that magic mental shift when giving up soda, a dramatic improvement in diet and removal of dessert entirely, complete emotional reorientation to food, a mild prescription stimulant, and varying levels of exercise did nothing, and ketone esters worked better than all of those but much worse than potatoes. Comments not attempting this will be deleted or mocked as I see fit.]

If you are thinking “ah, but clearly those all did contribute and the potatoes were just the last step”: I agree that’s likely. If I’d started minimal potato diet before BosPro it either wouldn’t have worked or would have been extremely bad for me. But since it seems to work for at least some other people who didn’t have all this baggage I think we need to update in that direction.]

Or take every person who got a second opinion on their cancer and was recommended diametrically opposing treatment plans. Doctors as a class are not as epistemically virtuous as I’d like, but that’s not (always) why they propose wildly divergent treatment plans. In most cases it’s because the answer isn’t obvious, or at best has only been obvious for a few years.

And then there’s the absolute shitshow that is nutrition research. No one knows what the average optimum nutrient level is and even if we did it wouldn’t be that helpful for figuring out the optimum level for a given individual, because humans are so unbelievably variable.

I could go on here, but if you’re reading my blog you’re probably already on board with shit being extremely complicated and I don’t want to belabor the point.

Moral of the story: when intellect fails, try luck guided by intuition

Some medicine is very deterministic. Antibiotics, most of the time. That daylong IV drip when I had norovirus that probably turned the infection from deadly to a kind of annoying 36 hours. We may not know the optimum level of a given nutrient but most severe deficiency diseases can be solved by giving you the thing you’re severely deficient in. My impression is statins work pretty reliably.

But a lot of medicine just seems to be kind of random. People go through 10 antidepressants and then somehow the 11th one works great. Ketone esters increase my energy level so much I gave up soda and caffeine entirely but do nothing for most people. All those books where the cure was a miracle for someone, and it can’t just be a placebo because there’s no reason for the 35th placebo to be the one that works but nothing else makes sense.

All of which leads me to conclude that once you have exhausted the reliable part of medicine without solving your problem, looking for a mechanistic understanding or even empirical validation of potential solutions is a waste of time. The best use of energy is to try shit until you get lucky.

Not at random or anything. My guess is the world contains metis and you do better-than-chance preferentially trying things that helped one guy on a message board for your condition (even though it was shown to make no difference in real studies) or going to alt-modality practitioners (even the one with proactively stupid justifications they insist on sharing). The latter is especially true if you can find a practitioner that accepts that their treatments don’t always work and have a system to notice that and change course, but I think maybe even the really gung-ho ones sometimes have good ideas (you just have to set up your own system for deciding when to quit). Just don’t get hung up on “do we understand why this works?” or “does this work for other people?”

Also please remember that side effects and drug interactions are a thing. Anything with a real effect can hurt you. I gave a very caveated suggestion of BosPro to someone on Twitter and it caused something akin to niacin flush in them. This is the same brand that does nothing to me but makes me better at digestion and uninterested in sugar.

So I guess the full and accurate statement of my beliefs is “Try solving problems with understanding first, but accept when you’ve hit diminishing returns and consider if your energy isn’t better spent increasing your surface area to luck”.

Parting shots

Fuck you every doctor who told me my digestive problems were in my head or my fault for being a bad patient and you couldn’t help me until I solved the problem that drove me to you. You were factually incorrect and you should feel terrible.

For potential clients in particular

People sometimes approach me for medical literature reviews aimed at their specific problem. There are forms of these I will do, but those forms do not include producing a mechanistic model and high-probability treatment for someone’s persistent, sub-clinical, amorphous problem that medicine has failed to solve. There are a few reasons accepting these commisions would be wasting the clients’ money, and one of them is that by the time they come to me they have found all the low hanging deterministic fruit. The best I can do is spend a ton of time generating lists of things that might work. Sometimes I do offer that, but people tend to prefer my other offer of a referral to a researcher that’s better at individualized treatment.

Bone Broth

Bone broth is having its moment- paleo likes it, nut jobs who believe vaccines cause autism like it*, whoever the hell these people are like it, my nutritionist is a big fan.  The idea seems obvious- bones are full of nutrients that hard to get, especially in the typical American diet, surely drinking bones would be good.  Especially for calcium.  Everyone knows bones have calcium.

I got suspicious when I noticed that the nutritional label on my broth** reported 0% of my RDA of calcium.  I checked a few more brands, the top contender lists 2% calcium RDA and 4% iron/6 grams of protein.  Most list 0.  nutritiondata.self.com gives considerably better numbers, but no source.  Their listing contains a good deal more fat (9g, as opposed to 0 in any of the commercial broth I’ve found) and a non-zero amount of carbs.  None of the micronutrients they listed (vitamin C, a few Bs, iron, calcium, manganese) are fat soluble, but maybe there is something to preparing it at home.

Some of the websites touting bone broth list other substances that aren’t on nutritional labels but they believe are important.  I am well disposed to believe this claim.  There is no reason to believe science knows all the micronutrients we need, much less a USDA oriented towards the well being of farmers, not consumers.  The specifically mention glycosaminoglycans, a class protein/sugar hybrid found in joints.  This seems utterly plausible, but I was unable to find any numbers of this. At all.

I found one scientific paper on bone broth.  It is in Korean***.  It has some English but not enough for me to actually determine the micronutrient:protein ratio.  Beyond that you have studies about the components of bone broth and the assumption that it will be absorbed in this form.  For example this paper on collagen and rheumatoid arthritis (PDF).  Given it has 60 people and RA is a cyclic disease, their results are actually pretty good, but that still leaves it open to any number of manipulations.  The second best paper is a press relief on an informal study of chicken soup.

That leaves protein.  Everyone agrees bone broth has serious protein, but unfortunately not the most important kind.  Protein is made up of amino acids, of which there are two kinds: non-essential (which your body can manufacture) and essential (which you must take in via diet).  The RDA for protein is 0.8 g/kg body weight, of which 0.1 g should be of the essential amino acids (there are per-acid requirements but I’m not tracking 9 individual requirements), so 20% is putting  you ahead of the game, except that broth is missing two EAAs entirely.  After 20  hours of cooking (see korean) paper, 25% of the amino acids are glycine.  For comparison:

  • The pumpkin-based protein powder in front of me is 20% essential amino acids (and has way more iron than broth)
  • Whey protein is 60% EAAs.
  • Soy is 34%

I have trouble digesting protein and find bone broth stunningly easy to digest, so this is still a win for me, but it’s a slam dunk.

While traveling I’m using bone broth powder, which I’m increasingly convinced is a fancy way of saying “bone-based protein powder”.  I’m okay with bone based protein powder, although I might not have packed the pumpkin if I’d realized this.

Do you know what else is basically a protein powder?  Cricket flour.  They taste similar, cricket has a better amino acid profile (25% essential) and more trace nutrients (although I’m still tracking down how many more).  It is also cheaper, which should make !broth feel bad.

I find it more plausible than the average miracle food that bone broth has effects beyond what you’d expect from a naive read of the nutrition facts, because I expect animal bone + meat to fulfill a broader range of requirements than some berry.   I do feel better when I drink it, but a lifetime of digestive and chewing problems has given me a tendency to develop food security blankets, and broth is currently filling that role.   Simply by being a security blanket that is not jelly beans or peanut butter cups****, broth is a health food for me, personally, but I can’t really extrapolate beyond that. The current press around it appears to be almost entirely groundless.

Once again, the state of nutritional knowledge is embarrassingly bad and I would like us to shift money towards increasing it.  Also why the hell can’t I test the  nutritional content of broth I make myself?

 

*To their credit, they have an explanation that doesn’t rely on mercury, which has been extremely thoroughly disproven.  If they had presented it as a fringe thing they needed to prove, I would have entertained their hypothesis.  They presented it as fact, without any attempt to distances themselves from the atrocious denialism of the mercury-based anti-vaxxers.

**I buy it frozen on the theory that my time and not having my house continually smell of meat was worth the extra money.

***I don’t think this would be hard to determine if you read Korean, volunteers would be welcome.

****Trader Joe’s brand- I’m not an animal.

ETA: I only just learned that bone broth means “bones + connective tissue”.  Clean bones give you hardly any protein, even if there’s marrow in them.  Apparently I don’t need to pay $10/bag for store made stuff, I can use $8 worth of chicken feet and liver and eat for a week.

Food Choices at EA Global

[EAGlobal was a wonderful experience that I haven’t written much about because my brain was too stuffed full of wonderfulness to produce anything useful.  I dislike that the first thing I’m writing about it is a controversy/complaint]

There’s a utilitarian thought experiment: would you rather have one person tortured for their entire life, or a googolplex of people experience a single dust mote in their eye?  I always viewed it as too theoretical to be anything but an ideological purity test, but I think I’m seeing a version of it in action right now, in the debate around serving animal products at EA Global.

You have a small number of animal rights activists saying “this is torturing and consuming a sentient being and that’s morally abhorent”, and a much larger number of omnivores going “but seriously, they’re delicious”.  The ARAs don’t understand why aesthetic preferences are overriding morality (and either don’t believe that animal products are ever medically necessary or don’t believe that outweighs the cost to the animal), and the omnivores don’t see why such a small group is getting to override their preferences because of a principle they don’t believe in.

I think the moral weight of the ARA’s concerns may actually be working against them here.  I don’t think many people would object if the organizers said “the local cuisine is vegan and shipping in meat is just too expensive, bring some in your luggage if you must.”  But the fact that the morality arguments exist and tend to resonate with people even if they don’t agree makes people defensive, and then aggressive.  Allowing the organizers to drop meat for morality reasons is an implicit endorsement of the idea that meat is indeed immoral, which has unpleasant implications for omnivore’s moral standing the rest of the week.  By the Copenhagen interpretation of ethics, better to deny that there is a problem than participate in an incomplete solution.

My original position, based mostly on the fact that I am simultaneously really bothered by and completely immune to ARA’s disgust-based arguments, was that EA Global had made the right call: vegan or at least vegetarian options in the main line, a small amount of meat hidden off to the side.  But now that I think the insistence on meat is strongly Copenhagen-driven, I’ve changed my mind.  Admitting unpleasant things about ourselves and making incremental progress is supposed to be one of our things.

[By that same token I think ARA’s should be a little happier about how much meat consumption was reduced that weekend, even if it didn’t go to zero.  But then, I’m an incrementalist]

At the same time, some people need animal products.  The definition of need is tricky here- my doctor has told me to eat small amounts of meat, but going three days without any will be fine, but in practice what was served at EA Global was too hard on my stomach and I wouldn’t have been able to eat enough calories from that alone.  Some people are on paleo and even if that wasn’t the healthiest choice, a sudden drop off in meat will be physically hard on them.  Some people have a lot of things they can’t eat such that meat is the easiest way to get them a nutritionally complete meal- especially when you have a lot of different people with a lot of different exclusions.  But even if meat were served, it’s impossible to fulfill 600 people’s dietary requirements with a reasonable amount of effort and money. The best solution may have been to announce the menu ahead of time so people could plan, and then let the chips fall where they may.

But I think we can do one better.  My new favorite solution is to offer both meat and whatever vegans nominate as the best fake meat and offer both without a way to distinguish between the two at the time.  Omnivores would be given one at random with a code that they could later use to register 1.  how much they liked what they were served and 2.  whether they think it was real meat or not.  If they really don’t like what they got they could go to a back room somewhere with their code and ask for the other one (still not telling them which they got).  The same back room could serve people who medically need meat and people who want the definitively vegan option.

This gives people who want but don’t need meat (and are able to eat !meat) a way to get it, and vegans a way to advance the cause of veganism, possibly further than they would get by banning it (by showing people how good !meat tastes).  In most circles neither side would find this adequate, but Experimenting and Using Data are What Effective Altruists  Do, and I think that could convince/pressure enough people (on both sides) into it that it would be worth trying.

Motion Sickness

The typical explanation for motion sickness is that your inner ear and your eyes disagree about whether or not you are moving, your body interprets it as food poisoning, and prepares to throw up.  This does not quite make sense to me, because it fails to explain any of the following:

  1. Why being a passenger is so much worse than being the driver.
  2. Why playing video games (eyes say movement, ears say stationary), reading in a bus (eyes say stationary, ears say moving) and riding a roller coaster (eyes and ears both say moving very fast)  produce the same feeling.
  3. Why smooth rides (subways, no-turbulence airplanes) are so much easier than busses, or why highways are easier than stop and go traffic.
  4. Apparently other people consider nausea a stomach issue, but for me it’s very much a head issue.  Motion sickness also gives me headaches.  What’s up with that?  Why is it so tightly correlated with sinus pressure?
  5. Why does low blood sugar feel so much like motion sickness?
  6. I’ve never experienced this, but television assures me heavy drinking produces the same effect.  Why?
  7.  Why does motion sickness give me temperature fluctuations.

I’ve heard a partial explanation for #3, which is that your inner ear actually senses acceleration, not movement, so a steady velocity doesn’t feel like movement.  And we have a very compelling proximal explanation for #6: the difference in density between water and alcohol stimulates your inner ear both as you get drunk and as you sober up.  So obviously the inner ear is very involved in this, but how?

Alternate hypothesis: motion sickness is designed to keep you from eating, because your body is not in a good state to digest. One way that can happen is if your sympathetic nervous system (responsible for fight-or-flight-or-stand-there-being-really-anxious) has kicked in, because it redirects blood flow and energy to things that are immediately useful in escaping from tigers (muscles, senses) and away from things that solve future you problems like digestion and the immune system (which are regulated by the parasympathetic nervous system).

Both the sympathetic and parasympathetic systems are regulated by the hypothalamus.  For fun I googled “hypothalamus motion sickness” and the first result was this rat based study,* which put rats in a “animal centrifuge” to induce motion sickness. I couldn’t find video of a rat centrifuge, but NASA helpfully provided video of a dog centrifuge.  It looks not quite as bad as a tilt a whirl, although the rats were exposed to double gravity so I should probably cut them some slack.

During their amusement park adventures, the rats experienced a spike in histamine production in the hypothalamus (how cool is it that we can continuously measure that?), and caused the rats to display characteristic motion sick rat behavior.  Inhibiting histamine production or removing the inner ear (the part that detects motion) caused both of these to disappear.  Histamines also help regulate body temperature, so that’s #7.  This suggests that anti-histamines would be useful at fighting motion sickness.  The good news is that this is correct, the bad news is that they make you sleepy and possibly give you Alzheimer’s.   That’s fine for any one time but I don’t want to make a lifestyle out of taking them.

A website my laptop unfortunately ate the link to has a subtly different explanation:  your brain tracks motor movement via an efference copy, creates a prediction of what sensory changes that should create, and they compares that to the actual sensory input.  Motion sickness might be your brain saying “these are too different, abort, abort”, or buckling from the intensity of calculation needed to reconcile the input.

I have always wondered why I/people hold my (our) breath during times of stress.  Unless you’re being hunted by a xenomorph right that second, oxygen deprivation is not helpful.

An artist's rendering of when holding your breath is useful
An artist’s rendering of when holding your breath might be useful

The most convincing hypothesis I’ve found is that your brain can only do so many calculations per second, compensating for breathing takes calculation, so you stop breathing.  That this rapidly starves your brain of oxygen, lowering the number of calculations you can do, is exactly the kind of long term thinking I expect from the human body which, lest we forget, takes in air and food through the same hole.  If both breath-holding and nausea can be caused calculation overload, we would expect the same things to cause them both. I can think of two things that do exactly this off the top of my head- sparring (but not drills) in martial arts, and playing Katamari, both of which involve complex spatial reasoning.  These are not great examples because there’s a lot of confounding variables, like extreme physical exertion while being hit in the stomach.

To summarize my speculation:  sensory input requiring too high a rate of calculation points you towards your sympathetic nervous system, which makes you nauseous so you won’t eat while you’re not capable of digesting.

This suggests that anything that kicks you towards the parasympathetic system should reduce motion sickness.  Unfortunately the parasympathetic and sympathetic systems run on the same neurotransmitters, so looking at the relevant drugs does not provide useful information.

This also suggests that anything that lowers the number of calculations you need to do will be helpful.  BCMC tested a heads up display that showed users their head position relative to the horizon.

Studies found it overwhelmingly helpful, although I haven’t dug into that paper in detail yet.  Unfortunately there’s no way to purchase the technology, so I’m left hoping someone picks up the patent.

In conclusion: we don’t really know what causes motion sickness and that there’s no known really good treatmen.  I am going to experiment with consciously tracking my head position relative to horizon and with rhythm games (which help integrate sensory data).

*The second result appears to be the exact same experiment, done 10 years earlier, with the exact same result.  It’s nice to see something reproducible.

Autism as Developmental Injury

Left untreated, people with phenylketonuria (PKU) can develop intellectual disabilities, seizures, and “other medical problems”.  But PKU does not cause any of those.  Phenylketonuria + a normal diet causes a build of of phenylalinine in the body, which causes those problems.  If PKU is caught at birth and the sufferer is kept on a phenylanlinine-light diet, they will never develop these problems.

Henry Markram suggests that something analogous is going on with autism.  He and his collaborators think that the actual problem is that autistic babies have extraordinary sensory sensitivity, and this sensitivity causes defenses that cause them to miss certain critical information during developmental periods.  What is challenging but achievable (the zone necessary for learning) for other people is overwhelming for them, so they don’t learn.  The developmental window closes and they’ve lost their chance to truly master that skill.  But if they were given stimulus in their zone of achievable challenge, they would learn those skills and maintain them for life.  They might continue to need accommodations, the way phenylketonurics need to stay on a phenylalinine-light diet their whole life, but with those accommodations they could function “normally”.  This is known as the intense world hypothesis.

The example they give is the critical period for learning language.  You *can* learn a new language after the critical period, but it will never be as easy, most people will never attain genuine fluency, and if you never learn any language it may be truly impossible to pick one up later.  If normal human speech is overwhelming to an autistic infant they will miss that period and their language will be impaired for life.  But if they’re given regular access to speech they are comfortable with (probably quieter and slower) they could learn it just fine, the same way hearing impaired children do fine with sign language.

I was also really impressed with the writing of this lay-press article.  I’ve been avoiding doing take downs, especially of popsci articles, because there are millions of wrong things every day and criticizing them is easy.  For a while I could justify them as case studies in critical reading, but now it just feels bad.  This had led to a lot of aborted blog entries, as I read something amazing and then realize it’s too flawed to pass on uncritically.   I don’t agree with everything the article says (insisting there’s only one cause of autism strikes me less as brave and more as idiotic), but it lays out its case in an informative and responsible manner.

Review: Surprisingly Vegan Waffle Mix

Before I was tested for food sensitivity my diet was incredibly reliant on eggs, dairy, and wheat, so you can imagine my dismay when I tested sensitive to all three things and was told to give them up.*  When I did so, I decided to shift to eating foods that naturally didn’t contain any of those things, rather than search out substitutes for my old staples.  My theory was that vegetables can be really awesome at tasting like vegetables, and meat can be… well at the time eating any meat was a huge struggle, but it was one I eventually expected to pay commensurate dividends.  But the vegan milks just remind me of how much better actual milk is, and the thing that makes gluten-containing food delicious is gluten.  Plus the imitation food tends to be incredibly processed in order to more closely approximate their originals.  If I was going to put a ton of work into learning to cook and enjoy different foods, I might as well pick the healthier of the two.

But everyone needs easy carbs some times, and more than one thai restaurant in my neighborhood now recognizes me on sight, so I needed some new options.  John served this vegan, gluten free waffle mix (referral link: Charity Science) at an EA event and I have to say: it’s pretty good.  Not good enough you’d choose it over regular waffles for taste alone, but pretty good.  The ingredient list is short and full of actual foods.

I seriously doubt this will apply to anyone else, but it’s interesting in light of my recent deep dive into appetite hormones.  When I eat waffles + syrup and nothing else, there is an obvious disconnect between different parts of my brain as to how full I am.  Each bite of waffle is ridiculously rewarding (indicating high ghrelin?), and yet I never seem to feel satiated, even as my stomach reports it is uncomfortably full.  I solved this problem by putting chia seeds in my syrup and interspersing waffles with swigs of protein powder (also mixed with chia seeds).  This seemed to get me the good parts of waffles while ensuring I also eventually stopped eating them.

One warning: they are not kidding about the cooking time for this mix.  It takes much, much longer than you are used to.  It is theoretically possible to turn this into pancake mix by watering it down, but I could never manage to give them enough time to fully cook.  Putting them in the waffle iron and walking away was easier.  The good news is they’re not as temperamental as regular waffles either, a few extra minutes doesn’t ruin them.  But do give them that extra time, or you will be eating batter.

*Many professionals believe that the test is purely a measure of what you’ve eaten, and that the immune reaction does not present a problem.  My personal experience is that I do much better when I avoid these foods.

r/fatlogic endorses creationism

Normally when I’m investigating something I like to read well regarded books on both sides, in the hopes that the ignorance will cancel out.  Finding a suitable counterpoint to Health At Every Size is hard, because its opposition is “everyone in the world”, and there has been no selective pressure to elevate the actual science away from the shame and aesthetic preferences.

For example, I spent a little bit of time on r/fatlogic which, as decisions go, was not my best ever.   r/fatlogic frames itself as a criticism of horrible “fat logic”- things like “700 pounds is no less healthy than 200 pounds.  Possibly healthier.”  This is not a great start.  I have a deep personal understanding of how frustrating it is when people are wrong, but I have found I am happier and a better person when I say “yup, wrong”, and then move on with my day.  For the truly awful I might e-mail a friend making fun of it (thanks, Rachel!).  Forming a whole club around criticizing people, especially people that are already having a pretty tough time in life, is bad for everyone.

r/fatlogic is even worse than that, because it has an extraordinary case of the cowpox of doubt.  Wrong people keep insisting body fat is independent of calories consumed and exercise?  Well then body fat must be solely dependent on calories consumed and exercise, and anyone who suggests it is affected by anything else is a fatty fat fathead making excuses for their fat.  They are literally denying  the possibility of individual variability in the translation of external environment into physical state.  For bonus points, they invoke “but thermodynamics”, which is the same argument creationists use against evolution itself.

Here I tried several ways to explain exactly how wrong they were and how that was terrible, but then I decided to take my own advice and stop before I endorsed the hollow Earth theory.  My current contender for an opposition book is Good Calories, Bad Calories, but I’m open to suggestions.

Health At Every Size Roundup

I read Health At Every Size and wrote a number of blog posts on it.  Some are follow ups on science it mentions but didn’t not examine in depth, some are spot checks of its scientific claims.  Neither set is comprehensive, but hopefully they are helpful.

HAES pre-check: What I thought about fat, food, and health before reading HAES.

Now I’m learning about hypothalamusing: The hypothalamus is the main coordinator of food consumption and use, and we have no idea how it works.

Ghrelin: The Hunger and Lung Development Games: the discovery that the hunger hormone also plays a crucial role in fetal lung development inspires a pun I will find increasingly difficult to maintain as the series progresses.

Leptin: Catching Chemicals: This one was a stretch.

Insulin and Glucagon: Mockingsugar: you try and come up with a food/health/fat based pun on the word Mockingjay.

Bariatric Surgery: HAES says it’s universally bad, my reading of the literature is that it’s awful, but sometimes the better choice.

Fiber: The Mr Rogers of Nutrition: Everyone likes fiber.

Obesity, Blood Pressure, and Study Design: partially an examination of the link between obesity and blood pressure, but mostly an explanation of why the studies we’ve done so far are so unhelpful.

Controls and Confounds: Why designing a study to determine causality is so hard.

HAES post-check: What I thought about fat, food, and health after reading HAES.

An Apple a Day Does Surprisingly Little?

How did apples get to be the standard bearer for all that is good and healthy? In terms of nutrient per calorie, they’re not that good. 1 cup has 65 calories, 3 grams of fiber (12% RDA), and 5.7 mg vitamin C (10% RDA), and very small amounts of a wide range of other nutrients. Pears are just slightly better: 1 cup has 81 calories, 4g fiber, 5.7 mg vitamin C, and enough potassium to be noticeable.  Meanwhile the same volume of grapes, so long derided as nature’s candy, have 104 calories, 1.4g fiber, 16.3 mg vitamin C, 22 mcg potassium.  Almost everything apples or pears have trace amounts of, grapes have slightly more of.

Wasting their lives
Wasting their lives?

I wonder how much of this is because of the skin:pulp ratio.  Produce skin tends to have a lot the bulk of the vitamins*.  Plus grapes are more colorful, and color intensity is a shockingly good proxy for nutritional value in produce.

I also wonder how apples got such a sterling reputation without the benefit of a good marketing firm.   My best guess is that they grow further north than most fruit and keep for much longer, and established cultural supremacy back when produce was scarce and fruit did not regularly fly.

Full disclosure: I was originally going to compare apples to iceberg lettuce, which I had previously seen described as nutritionally vacuous but easy to ship.  But when I looked it up I discovered iceberg lettuce actually has a pretty good nutritional profile.  1 cup has 10 calories, 1 g fiber, 2.0 mg vitamin C, and 22.0 mcg potassium (22% RDA), and trace amounts of other stuff, which makes it strictly better than apples on a per calorie basis.

While we are at it: spinach does not have that much iron.  It has a number of other vitamins and is very good for you, but the original reputation for iron-richness came from some guy putting the decimal point in the wrong place (source: some guy at a party 6 years ago).  In fact the oxalates in spinach bind iron, making it harder to absorb.

Apples aren’t bad for you.  If you want an apple, eat an apple.  But if don’t want an apple and are trying to cajole yourself into it to make doctors keep their distance, consider grapes instead.

*Also the pesticides.

HAES post-check

A chief contention of Health At Every Size (Linda Bacon) is that human beings can’t lose weight, so even if it would optimal for them to weigh less, there’s nothing to be done about it.  Is this true?  It’s hard to answer, because the question isn’t very well defined.  Bacon admits there are things human beings can do to gain weight, and when they stop doing them, they sometimes lose weight.  So if you’re doing those things, you probably can lose weight.  And that people have a set range they can move around in healthily, based on diet and exercise, so if you’re at the top of your range now you could lose 20 pounds and still be okay.

On page 143, Bacon very strongly implies that twins maintain the same body weight even when they have very different activity levels, so weight is controlled by genetics.  The studies she cites do show that when activity and diet is held constant, two unrelated people will have different health metrics.  They also show that when two identical twins have different activity levels or diets, they will have different health metrics (including weight).  Oh, and the combined sample size of both studies together is 35 sets of twins.  This is where I started to get angry.  I get using weak studies that strongly support your hypothesis.  I get misleading people about what a study stays to support your hypothesis.  But doing both is just…argh.  I supported HAES.  The actual prescriptions for food are basically the Michael Pollan diet (eat food, mostly plants), and motivation to retrain yourself to like real food rather than hyperprocessed crap.  Those goals are good.  Those goals are good even if they lead to weight gain, because under most circumstances produce is good for you and cheetos are not (although not all- this Captain Awkward post is full of people for whom carrots trigger intense digestive distress but hamburgers are safe and nurturing.  I used to live off of pasta because anything else felt like eating death.)

I did check Bacon’s sources on the claim that people who lose dramatic amounts of weight tend to gain it back within 5 years.  That appears to be true, at least in the studies she cited.  And yet, she also cited studies showing that activity level affects weight.  My explanation is that losing weight is not a thing you do.  Your diet and activity level translate to a weight or body fat percentage*.  If your current weight is different than that, it will move towards it.  If you change your behavior, you will move towards the new translated weight.  The translation appears to be a combination of genetics and perhaps past experience (she claims loss-and-regain cycles increase the set point.  I’ve read that a lot of places, but at this point I neither trust her nor have the heart to investigate).

So how do my current views compare to those I held before reading HAES?

Exercise- still good for you.

Human diversity- still vast.

Impervious of weight to diet and exercise- depends a lot on what you mean.  I will never look like Keira Knightley, but I will probably lose fat if I exercise more.  Which I have just started to do after ceasing for a very long time because I was recovering from surgery, and will pause again when I have my next surgery, because the health harms outweighed the benefits.  Fat is a proxy for health, but not the only measure of it.

Large amounts of fat are quite bad for you, but it’s unclear where that effect kicks in.  The American aesthetic ideal is much lower that the healthy weight cut off, and may be actively unhealthy. In the normal range, diet and exercise have bigger health impacts than fat.

Our food supply is definitely fucked.

Fat people still don’t deserve to be shamed, especially under the guise of for their health.  First because no one deserves to be shamed, but especially because shame is super bad for your health.  It is intrinsically bad and it keeps people from seeking medical care, for both things related and unrelated to their fat.  Stop doing it.  People owe you neither their health nor their attractiveness.

*Weirdly, in my case it appears to be weight.  I’ve had a shockingly consistent weight despite large changes in activity level and muscle mass.