The advanced Macrobolic Nutrition profile in Up Your MASS provides the precise 45/35/20 ratio of macronutrients (carbohydrates, proteins, fats) to help promote exceptional gains in muscle mass. Just as importantly, the sources of these macronutrients are superior to those found in most nutritional products. Macrobolic Nutrition creates the ideal metabolic and hormonal environment for increased muscle size, strength and endurance.