after eating do we feel full based on the volume of the food we eat or the calories we consume?



after eating do we feel full based on the volume of the food we eat or the calories we consume?

In: Biology

Volume of food. Your stomach has nerves which sense how much it has expanded. This is why if you eat faster you’re more prone to overeating than if you eat more slowly.

There are multiple satiety signals. Some detect the amount of stretch, some detect certain nutrients such as proteins and fats.

You can get very full on a small volume of food if it has a high fat content. But for most people, eating fat alone doesn’t seem to be enough to trigger satiety.

Other hormones that play a role in satiety:
Peptide YY

It’s many things combined, including volume of food, composition of food, but also time of day, your mood, if you are busy, how fast you eat, how the food is served and so on.

hm…. eating 1000 calories in chocolate and 1000 calories in potatoes… well… i´d say VOLUME plays a major role.

The hormones Ghrelin, and Leptin, play big parts in your body determining whether or not you have the hungry/full sensation.

Adding to what the others said it is also about the time you spend chewing something, also feeling full usually only starts about 20 to 30 minutes after eating regardless whether one ate a medium amount or a lot. So when wanting to reduce the caloric intake it might be useful to eat one plate of something and before getting seconds because you are still “hungry” to wait a couple minutes. Most of the time then you are full. Or eating slowly so you get to the half hour check point with your first portion

Basically you have 3 sensors: weight, volume, and calories density or nutritional value. So, you can feel full on a bag of fries, and you can feel full eating a massive salad. And while the salad is healthier and more packed with nutrients and fills more volume, it has less weight and you’ll digest it faster. So you’ll feel hungry sooner. The fries will fill you up oil-calories wise, but will take longer to digest and therefore make you feel full for longer. There’s a great pictogram out there of illustrated stomachs & how full they get based on different foods. I’m not sure how to link things. Google “calorie density” and find the photo of stomachs [stomach pic](

These answers have been interesting. Normally when I eat dinner no matter what it is and I’m fine. My wife has been making braised short rib like once a month later, and while it tastes amazing, I seem to get far more full that I do when I eat the same amount of other foods, I guess it’s the fats? Too delicious?

I have input that is purely anecdotal…

I’m one of the weirdos that jumped on the Soylent train. Love that shit, makes work lunches super easy.

If I mix up, say, a 600 kcal of this goopy nutritional slurry, at the end of it, I don’t fee “full” in the same way I do after, say, a chicken dinner or a trip to McDonald’s.

*however*, I do feel almost completely satiated. The “hunger” has gone away but I don’t feel “full” or bloaty and slow.

I read in a book: they did a study with 2 groups. At an all you can eat buffet, group 1 had no restriction what to eat. Group 2 had to eat a certain protein amount. Turns out group 2 consumed less calories. So I would say we are full when having eaten enough protein.

You can get full eating a large portion of something that has almost no calories.
Like lettuce.
Calories don’t get you full , volume does.

There’s a great book called Proteinaholic where a bariatric surgeon talks about this exact topic.

Bit of both. Many things contribute to you feeling hunger. Your blood sugar levels, how full your stomach is, and certain hormones can make you feel hungry or full.

Lots of the characteristics of the food you eat matter too. What type of food(carb/protein/fat), fiber content, water content, even the food being hot or cold can make a difference.

Volume for sure. I’ve done a lot of experimenting 😬

I think calories will make you feel satisfied longer. I can drink a Diet Coke and feel full, but not for long

It’s literally just volume, hence why overweight and obese people who struggle with controlling their calorie intake get surgeries that decrease the size of the stomach. It is also why eating a lot of vegetables and drinking water fills u up despite its very low calorie content.

Your question has already been answered, just wanted to add that I recommend Why We Eat (Too Much) by Dr Andrew Jenkinson. I’m reading this at the moment and on a chapter explaining leptin, ghrelin and satiety very well.

It’s both. If you fill up on broccoli, you didn’t intake that many cals but now your stomach is full and tells you to stop. If you’re eating something high in protein, you will feel satiated with a much lesser volume of food than the broccoli. So it depends.

mostly calories. If you eat a huge bowl of spinach your stomach will fill but youll be hungry again before long.

Calories are a measurement of the energy produced by burning the food we eat, they aren’t units of mass.

The other measurable parts of food, how many grams of this or that (carbs, fats, protein), allows us to measure what the caloric equivalent would be. But the body never knows anything about the idea of Calories.

Mostly the volume of food.

Your stomach has mechoreceptors (sense stretch) which gives you the “I’m full/stuffed” feeling. Gastric bypass surgery works by reducing the volume of your stomach so less food makes you feel more full. However, this is different from not feeling hungry. Many people will eat even when they’re not hungry just because they don’t feel full, this is one of the many factors leading to obesity.

Ghrelin is one of the hormones that make you feel hunger, though a lack of ghrelin doesn’t make you feel full it just means you aren’t actively hungry.