Protein Directory

Protein is an essential nutrient that promotes growth, strength, energy, weight loss, and more. Common sources of protein include poultry, eggs, beans, beef, milk, cheese, soy, and more. Some people enjoy protein bars or shakes. High-protein diets are popular, though not always healthy. Follow the links below to find WebMD's comprehensive coverage about protein sources, protein foods and diets, and much more.

Medical Reference

View All

Features

View All

Video

Slideshows & Images

View All

Quizzes

Expert Commentary

View All

News Archive

View All