Does protein make you gain weight?

Eating too much protein can lead to weight gain. Anytime someone eats more calories than he burns, weight gain is the most likely result, even if those calories come from a healthy protein source.

Protein is a nutrient needed to help build and maintain muscle mass. When adding more protein to a diet, it's important to accurately calculate and measure it. Any excess protein that does not get broken down by the body and used as an energy source winds up being stored as body fat. So while protein is a necessary part of a person's diet, it should be consumed in moderation.