The only way to be exceptionally healthy and thin is to ignore the urge to overeat, and this urge is extremely dynamic on a per human basis. As a result, some people out there will eat a case of potatoes and still feel very hungry and unsatisfied.
Yeah, just not according to science.
E.g. there's ghrelin, cholecystokinin and other "satiety signals".
Except if you mean "satiefy is a mental construct" the same way pain is a mental construct. In which case, in a Kantian way, everything is, including space and time.
>What your brain tells you to put in your stomach is almost entirely divorced from nutritional requirements for thriving and surviving.
(a) You'd be surprised.
(b) It only appears that way because we have diverged in a exteremely small span of time (evolutionary speaking) into completely different circumstances and food availability.
Otherwise, what the brain tells us is very much based on nutritional requirements for thriving and surviving.
It's just that in 2022 we have an endless supply of food we can just order or walk into a supermarket and buy, as opposed to food scarcity where we don't know if we will be able to find something to hunt tomorrow - like the last 100,000 of thousands of years before historical times (and millions of years considering our primate ancestors)...
sorry, dont care
You also seem to think that the prevailig theory at some era is intechangable with arbitrary personal opinions about how things are.
https://slimemoldtimemold.com/2021/07/07/a-chemical-hunger-p...
E.G. it’s examples of the Maasai and Inuit eating higher calories make a lot of sense when you consider their exposure to temp extremes and additional cal burn coming from thermoregulation (along with probably elevated levels of daily activity).
Most of the nuance I’ve seen around CICO that holds isn’t that CICO isn’t true, it’s that the intake and output are hard to calculate when you look at nutrient absorption and lifestyle
If you want someone to gain weight, do the same calc, tell 'em to eat 100 more calories. Not gaining? 200. Really not gaining? Wow, fast metabolism, shock 'em with 500 extra. Anecdata, but the only time I saw someone not slowly gain on 200 extra, there ended up being a lot of walking we weren't accounting for in our maintenance cal calculation. Our O in CICO was off. For reference, 200 cals is like a 16 oz of coke, or 2-3 apples. Decently precise.
The variance between a fast and slow metabolizer isn't 20% of daily calorie burn, maybe 10% on the high end. Guesstimation, probably more like 5%. Well within the tolerances that are used for weight modulation (up or down).
If it weren't the case, why are so many body builders (natty or enhanced) able to run repeated bulking and cutting cycles? Are they genetic outliers?
Can you calculate it 100%? Nope -- so many variables, probably tons we don't even know about yet. But it's accurate enough to be very effective, and very simple to implement.
I'm sort of with you, but it sounds more to me like: start eating less, and you'll lose weight; eat more, and you'll gain weight. There's just too many variables here that change how food is metabolized and digested; including the microbiome which CICO ignores.
the other answers here are more detailed, I just wanted to state it simply.
Again, the digestion point seems to reinforce CICO. If you gain weight because your digestion is slower (let’s grant the point), it’s not because your body some how treats calories differently, it’s that you’re getting more calories from your food. Your calories in are higher.
Not to mention that diet products have existed to game your digestive system to absorb less calories from your food. With the rationale being… less CI in CICO. See also: folks abusing laxatives for this purpose
Throwing information out like this (w/o source and at best poorly replicated), that CICO is useless because of digestion rate, is incredibly dangerous because it falsely legitimizes that hopelessness. It traps people. And it maybe only applies in <1% of cases, where you have not just obesity but also compounding, very specific digestive issues. The opposite is also true — you don’t just drink coffee to knock off enough cal absorption to make a diff — you take laxatives you don’t need and have extremely abnormal, frequent BMs.
Anyone and everyone can lose the weight. It’s just CICO. You gotta figure out your input and output to account for the minor individual variances, and lock in a lifestyle to do it. But it’s just CICO at the end of the day.
Different people use different amounts of calories to do the same things (including sitting around), and different people extract different amount of calories from the input. Some people can extract calories from PF Chang or Buca di Beppo, but not me. Weight control by eating foods that go straight through sounds terrible though.
You can run an additional control loop mentally but what purpose does that serve? Reducing caloric intake while your body screams increase caloric intake is very difficult. You should instead use the control loop you already have.
sorry, I don't care
Are you implying that there aren't physical manifestations that cause hunger? In other words, I could inject you with a suprahuman amount of ghrelin and you wouldn't feel hungry?
I'm unsure if that "support" for my argument exists.
However, it is true that your hunger urges are not solely based on thriving and surviving, but also significantly on the current state of your gut bacteria, which is highly influenced by diet and stress. They say the gut is a second brain for good reason.