Soy protein is an excellent alternative to whey or casein for people who do not consume dairy. It also contains all the essential amino acids. Protein powder is a popular nutritional supplement. Protein is an essential macronutrient that helps build muscle, repair tissue, and make enzymes and hormones. Using protein powder may also aid weight loss and help people tone their muscles. Eating soy is a great way to increase your plant protein. Research indicates that including more plant protein in your diet, as opposed to more carbohydrate, has clear cardiovascular benefits, such as lowering blood pressure. Soy foods are naturally cholesterol-free and low in saturated fat. Eating soy-based foods is a great way to boost your fiber intake. Soy foods contain omega-3 fats, essential polyunsaturated fats.