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Biohacking Lite

karpathy.github.io

251–260 of 370 posts

Re: Biohacking Lite

#251
I don't think the advice of not eating fruits is a good one. Nothing wrong with eating an orange every day let's say. The key is to eat things whole. Juice is indeed not recommended,

Re: Biohacking Lite

#252
post #77

Earlier quoted context omitted.

> I think sugar is the main problem (not fat) Most of the research is that it's both. (Tt's the worst when fat and sugar are together) Specifically food is more rewarding, denser, cheaper, and easier to find than it used to be, so we overeat it. Same thing happens with almost any animal that's given ad libitum access to the american diet. It seems there are two societal solutions, extremely heavy handed government in…

It doesn't need to be extreme, taxes are proven to be effective and are quite simple. They solve the problem of unhealthy food being too easily available by raising the price to reflect the true cost to society (the externalities, like obesity). Junk food is only cheaper than healthy food because our society has made that choice, and it can just as easily choose to change that.

> Junk food is only cheaper than healthy food because our society has made that choice

I don't this is really true? Candy is expensive. Chicken thighs, certain cuts of pork are affordable. Along with rice and filling sides like beans. You can eat well and cheap.

It might only be cheap if you're talking about time too?

Re: Biohacking Lite

#253
post #223

I do not understand the obsession with keto/low carb diets. There are no long term studies showing the touted magical benefits. Even Gary Taubes, author who amassed wealth bashing carbs and touting keto diet, funded studies that he thought would confirm what he was saying, but then results came in slight favor of high carb diets against low carb high fat diets in terms of losing weight. Yes, processed sugar is crap,…

Not trying to be nitpicky but urine sticks are notoriously unreliable: False-positive when you are first starting because you are not well adapted to utilizing ketones and urinate out most of the BHB. False-negative when you are well adapted because usable fuel will not be wasted in urine. It is generally accepted that the only foolproof way to truly know if you are in ketosis is to do a blood BHB measurement. Other…

I agree with most of what you said. Yes sticks are unreliable, but I know my way around food and know how to keep my daily intake of carbs to be And yes, food research is very problematic. Some reasons are valid, for example we will probably never have randomized double blind placebo control study on various food intake patterns which lasts years or decades because it would cost too much and is very hard to do. But we can draw at least some conclusions based on the weight of evidence that we have. My only "problem", setting anecdotes aside, is that people jump on latest trends and make a cult out of it, when there are not even low quality observational studies to support what they claim. For example lately carnivore diet pops up too often with magical claims.

There are differences between people, and some will thrive on some diets where others would be miserable. But that is why we need to find the biggest common ground for all of us first then optimise on differences. Cut all the fluff and pointless optimisations in the beginning, first stick to the most basic things : eat real food, move moderately, sleep well, don't drink alcohol or at least not too often or daily, try to be less reactive (less stressful), do it for a few months and then try to optimise for your ticket in the gene lottery.

Re: Biohacking Lite

#254
post #51

I'm French (and incidentally a doctor,and my post is not judgemental in any way, this is not the point). Everytime I travel to the USA, I'm puzzled by how difficult it is to "eat normally" (= by my own standards). You can find really good junk food everywhere, or pay a really high price to eat in high-level Italian restaurants for example, but it is very difficult to eat standard meat-with-vegetable-without-sugar-add…

I find that the Wholefoods and big Walgreens stores have the best natural healthy food for the least amount of money.

Re: Biohacking Lite

#255
post #242

Earlier quoted context omitted.

Not quite. Sugar spikes your insulin, insulin provokes fat storage. This does not happen with fat, so it is harder to get fat by eating fat. If you want to get fat, like a sumo ringer, simple carbs are the way to go.

Insulin is not required for fat storage. Insulin spikes do not create energy out of nowhere and don't suddenly make the same number of input calories multiply. Also, insulin spikes are nearly unpredictable anyway. Carbs aren't necessarily the trigger, protein and fat can be too. Sometimes foods are synergistic and spike insulin together more than eaten separately. Insulin spikiness is also determined by food in your…

The linked-to discussion of insulin has a major error logical error. The title is "Insulin: An Undeserved Bad Reputation", but then the body of the article says for example "Carbs are not alone in being responsible for insulin secretion. Protein can cause just as much, if not more, insulin secretion as carbs". This is a straw man, because the point that is trying to be refused is that "insulin is bad", not "carbs are bad".

Insulin, being necessary for healthy human life, is certainly not "bad". However, a shortage (e.g. Type 1 diabetes) or excess (e.g. Type 2 diabetes) is certainly a problem. Given the current epidemic of Type 2 diabetes, metabolic syndrome, and NAFLD, triggering excess insulin production is certainly something to be wary of.

Also of concern is impinging on the glucagon cycle, and in the linked-to post there is no mention of the important function of glucagon, which is typically considered as having effects opposite to insulin. Maintaining the insulin/glucagon cycle is important in maintenance of a healthy metabolism.

The article makes a point about how "Insulin is not needed for fat storage", but omits the fact that in reality, practically all fat storage is mediated by insulin and its effects on glucose. Insulin mediates glucose transport and promotes absorption of blood glucose into the liver, fat and muscle cells. Once the liver has filled its compliment of glycogen, it will indeed produce fat locally. Non-Alcoholic Fatty Liver Disease (NAFLD) currently afflicts about 25% of the entire human population, and the linked-to author would have the reader believe that excess insulin production isn't an issue? Very strange.

All in all, this article paints a false picture of human metabolism. People eating a typical Western diet should be concerned or at least aware of the facts of that process, and be wary of having an excess or deficit of insulin; and should know that the excess case is the more common condition. A reasonable scientifically-accurate depiction of the process can be found, for example, in Jason Fung's books, "The Diabetes Code" and "The Obesity Code".

Re: Biohacking Lite

#256
post #224

Earlier quoted context omitted.

> I'm puzzled by how difficult it is to "eat normally" That very much depends on your location. High tourism locations will often have lots of junk food places. If you can move larger distances (i.e. rent a car and the like) you'll find wonderful and cheap restaurants pretty much anywhere. Even in otherwise expensive places like SF or NY. Here's the problem though: portion sizes are _enormous_ . It took quite a bit o…

> If you can move larger distances (i.e. rent a car and the like) you'll find wonderful and cheap restaurants pretty much anywhere. Even in otherwise expensive places like SF or NY. After doing a trip in America, I interpret "eat normally" for a French as not eating in the restaurants, but the food available in the supermarket that you cook at home. Finding vegetables, fruits is hard, if not impossible. You don't fin…

I think you did not end up at an actual supermarket. I’ve never been to one that doesn’t have eggplant, tomatoes, zucchini, or red peppers.

Neighborhood bodegas, which can look like small shops selling food, are a very different type of establishment, and sound like what you’re describing. Perhaps you are ending up in those? (They’re rife in tourist areas!)

Re: Biohacking Lite

#257
post #242

Earlier quoted context omitted.

Insulin is not required for fat storage. Insulin spikes do not create energy out of nowhere and don't suddenly make the same number of input calories multiply. Also, insulin spikes are nearly unpredictable anyway. Carbs aren't necessarily the trigger, protein and fat can be too. Sometimes foods are synergistic and spike insulin together more than eaten separately. Insulin spikiness is also determined by food in your…

The linked-to discussion of insulin has a major error logical error. The title is "Insulin: An Undeserved Bad Reputation", but then the body of the article says for example "Carbs are not alone in being responsible for insulin secretion. Protein can cause just as much, if not more, insulin secretion as carbs". This is a straw man, because the point that is trying to be refused is that "insulin is bad", not "carbs are…

> This is a straw man, because the point that is trying to be refused is that "insulin is bad", not "carbs are bad".

I don't see how this is a strawman. Click through to the source article, that bullet point in particular is refuting the common belief that carbs alone are what spike insulin. Most insulin-centric discussion on fitness forums (which is where this was posted) tends to mention insulin spikes in the context of high-GI carbs.

> Also of concern is impinging on the glucagon cycle, and in the linked-to post there is no mention of the important function of glucagon, which is typically considered as having effects opposite to insulin.

Read the linked "part 1". It specifically mentions that newer research shows that glucagon does not counteract insulin as previously thought, and links some studies.

> The article makes a point about how "Insulin is not needed for fat storage", but omits the fact that in reality, practically all fat storage is mediated by insulin and its effects on glucose.

That isn't really relevant to the core point, which is debunking the idea that insulin is what makes us fat.

I just want to restate the fact that the above reddit post is a summary of articles, which themselves are a summary of studies. It is targeted at fitness people who are discussing insulin only in the context of weight loss. There is of course an oversimplification here due to omitting details the target audience might not need as well as being 2 steps removed from the source material.

Re: Biohacking Lite

#258
post #98
post #51

I'm French (and incidentally a doctor,and my post is not judgemental in any way, this is not the point). Everytime I travel to the USA, I'm puzzled by how difficult it is to "eat normally" (= by my own standards). You can find really good junk food everywhere, or pay a really high price to eat in high-level Italian restaurants for example, but it is very difficult to eat standard meat-with-vegetable-without-sugar-add…

As a Chinese person born in America, you're absolutely right. If you don't cook, it's difficult to eat reasonably / "normally" in this country, even if you have money. You kind of have to pick your poison: salt, sugar, unnatural fats, etc. At least I grew up on the east coast and my parents cooked. Anecdotally, I'm shocked by what my acquaintances from the midwest eat, and the consequences really start to show up whe…

Margarine? Absolutely. Margarine was huge post-war time. In fact it was so scary to the dairy industry they lobbied to have it turned pink. That failed but you couldn't sell yellow margarine.

Who knows what additives were in our grandparents' foods.

Re: Biohacking Lite

#259

I was a little bit disappointed that the title promised an introduction to biohacking, but in practice, by the end, it amounted to how to lose weight. The "hacking" part is in understanding how the body processes energy and how eating affects that, I guess. Still, from that title, I think it was fair to expect a different article.

I mean.... what did you expect... "I CRISPR'd myself and now i'm photosynthetic?"

Re: Biohacking Lite

#260
> if you’d like to shortcut my rambling my TLDR final diet in order of importance: Eat only from 12-8pm. Do not drink any calories (no soda, no alcohol, no juices, avoid milk). Avoid processed food (follow Michael Pollan’s heuristic of only shopping on the outer walls of a grocery store, staying clear of its center). Avoid sugar like the plague, including to a slightly lesser extent natural sugar (apples, bananas, pears, etc - we’ve “weaponized” these fruits via strong artificial selection into actual candy bars), berries are ~okay. For meat stick to fish, occasional chicken is okay, avoid beef/pork. Avoid carbohydrates and “empty calories” (bread, pasta, potatoes, rice), replace with fats and proteins.

I admire this effort, but I have a huge problem with the conclusions. Simply "avoid carbohydrates" is silly advice. Billions of people live quite healthy lives eating carbs (pasta, bread, rice). How can you ignore this simple fact? I understand what the author is trying to achieve, but... I can't take this as good advice. Bits and pieces, yes. Everything? Unlikely.

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