Peanut butter doesn't fill me up at all. I can consume 1k calories of it, nothing, still hungry after.

Same with fish, I cannot get full eating fish in any quantity. Shrimp, sure, but not fish.

Nuts, same deal. I'll eat 500+ calories of nuts, does nothing for me.

See a doctor.

What do you imagine a doctor would do with this information?

Most likely, they'll say hmmm, that's strange and you probably should try to avoid eating so much peanut butter in one sitting. Maybe they'll give you an invasive test that's probably not conclusive or inexepensive.

Tell you 1) you have an issue... 2) everything is fine 3) perhaps you are imagining things.

Plenty of other foods fill me up just fine. A 4oz steak and some broccoli. Bacon and eggs. Meat + a veg does me fine.

> See a doctor.

Doctors know next to nothing about gut biome stuff.

"I don't get full eating an entire jar of peanut butter" is going to result in the doctor telling me to not eat a jar of peanut butter.

Heck plenty of people don't get full eating entire tubs of ice cream. The answer is to avoid downing tubs of ice cream.

You just listed a bunch of things that don't make sense? See a specialist rather than quibbling over the definition of doctor.

You ever tried eating fish with bones in it? It takes me forever. By the time I finished picking the bones out of 700 calories of fish it'd be time for my next meal. Meanwhile I have friends who eat fish just fine and get full.

FWIW Salmon drenched in butter and lemon does the trick, but that kind of feels like cheating.

Maybe fish sticks would fill me up? Heck if I know.

Peanut butter is another one, plenty of people can eat crap tons of peanut butter and not get full. Other people get full from peanut butter easily.

Same goes for nuts, and a ton of snacking foods. That is why they are called snacking foods

I once had a coworker who could honest to goodness get filled up from an ice cream cone. Calorically, that is correct, but the vast majority of people's bodies will completely ignore calorie math when consuming ice cream (see: Common jokes about a separate desert stomach).

> See a specialist rather than quibbling over the definition of doctor.

"Hi doctor, yeah, I have a normal BMI and I am in above average health and I work out multiple times per week but some guy online says I should see you because I don't get full eating peanut butter."

You do realize that there are literally not specialists for this stuff? If medical science understood why some people never get full eating certain foods, we wouldn't have so much obesity.

On the flip side, food scientists understand that fat + sugar = never satiated. That is why donuts are even a thing. Realistically a donut and a sweetened coffee are "enough calories" but they aren't satiating at all.

And then there is the nastiness of the human body mostly ignoring liquid calories all together[1], outside of mechanical fullness of the stomach. That is why starbucks can get away with selling drinks that have almost an entire day's worth of calories in them.

[1] Protein shakes are a notable exception to this.

> You ever tried eating fish with bones in it? It takes me forever. By the time I finished picking the bones out of 700 calories of fish it'd be time for my next meal.

I have a technique that works well 80% of the time: just pull the spine upwards and hope none of the smaller bones break off — and that's a nice, mostly deboned fish!

Eh, different people respond to food differently. This is not controversial. This whole discussion has a huge amount of bro science, and very little actual science. To the limited extent such a thing even exists in the nutritional space.

Not that differently. If you eat a thousand calories of peanut butter and don't feel anything there's something profoundly wrong.

A thousand calories of peanut butter is one cup, 8oz, of peanut butter.

Maybe 4 or 5 good spoonfuls.

I'm willing to bet that almost any healthy adult could down 4 spoons of peanut butter w/o issue, and that most people would end up being way over their calorie limit for the day as their body wouldn't go "yup that was lunch and half of dinner! All good now!"

The quantity given was in calories, about 1/2 of what you need in a day. Yes PB is heavy, yes that amount should register.

Drink a glug of olive oil. You'll probably be very regular on the toilet the next day, but your body will still ask for more calories, despite the 500+ you just consumed.

4 spoon fulls of peanut butter may or may not register. That many calories in a very short time frame often does not.

I take shots of OO regularly. Stops hunger but slowly, because it takes a while for body to convert to fat metabolism.