A 1/3-cup (100-gram) serving of canned navy beans offers 0.7 grams of leucine ( 9 ). They're also a good source of protein, fiber, and micronutrients like folate and other B vitamins, manganese, iron, phosphorus, magnesium, and potassium.

What foods contain high leucine?

Dairy, soy, beans, and legumes are sources of leucine. Phenylalanine is in dairy, meat, poultry, soy, fish, beans, and nuts. Tryptophan is in most high-protein foods, including wheat germ, cottage cheese, chicken, and turkey.

Do beans have all 9 amino acids?

Together, rice and beans contain all nine essential amino acids to form a complete source of protein.