HUMAN NUTRITION

Detailed explanation-1: -Even though peanut butter is fairly protein rich, it’s low in the essential amino acid methionine. Peanuts belong to the legume family, which also includes beans, peas, and lentils. Legume protein is much lower in methionine and cysteine compared with animal protein.

Detailed explanation-2: -When a protein lacks one or more of the nine essential amino acids, it is known as an incomplete protein. Peanut butter lacks the essential amino acid methionine, but is high in lysine. All plant-based proteins are incomplete protein sources except for soy and quinoa.

Detailed explanation-3: -Peanut butter is rich in heart-healthy fats and is a good source of protein, which can be helpful for vegetarians looking to include more protein in their diets. A 2-tablespoon serving of peanut butter contains up to 8 grams of protein and 2 to 3 grams of fiber.

Detailed explanation-4: -The protein in peanuts Most plant proteins are incomplete sources of protein, meaning that they lack one or more essential amino acids. Peanuts, however, are a complete source of protein, meaning that they contain all eight essential amino acids in sufficient amounts.