Medically reviewed by Roxana Ehsani, RDFoods high in protein represent a variety of options, with many food choices in the meat, poultry, fish, beans, nuts, whole grains, dairy, and soy categories.

The amino acids found in milk proteins are in the ideal ratio for promoting ... while whey accounts for the remaining 20%. Casein is a slow-digesting protein, which means it's ideal for muscle ...