Walnuts are an excellent source of protein. Although walnuts are not a complete protein, they contain many of the essential amino acids your body requires. The protein in walnuts is broken down into these component amino acids, which are then used to support physiological processes such as muscle repair.
Protein is one of three macronutrients your body needs to thrive (carbohydrates and fats are the other two). Incorporating protein into your diet not only helps your body rebuild its tissues, but it also triggers feelings of satiety. This means that you will not be reaching for an unhealthy snack just an hour after your meal.