Meals with more protein tend to make people eat less at their next meal.

Obese men feel less hungry after eating high-protein meals and eat less afterward when they eat meals with more protein, no matter if it's high-protein or just enough protein.

Just eating more protein doesn’t make you less hungry — but if you take out carbs and add fat instead, you feel much less hungry.

When lean adults reduce their protein intake from 15% to 10% of their daily calories, they tend to eat about 12% more calories over four days, mostly by snacking more on savory foods, suggesting that lower protein levels may lead to increased overall food consumption.

Even small changes in how much protein is in a meal — not huge amounts — can help people feel fuller and eat less, whether they’re lean or obese.

When lean men eat meals with more fat or protein instead of lots of carbs, they feel less hungry, fuller longer, and end up eating less food later.