USN Muscle Fuel is an advanced engineered meal replacement formula that is designed for active people who demand the benefits of top quality proteins, complex carbohydrates, and nutrients for optimum health and muscle performance. Studies suggest that using a variety of protein substrates may work best for improving protein synthesis and overall health. Unlike other meal replacement formulas, USN's Muscle Fuel is low in sugar and also offers a variety of anti-catabolic amino acids. This unique formula combines high biological value proteins with a very low glycaemic index carbohydrate to build and repair muscle tissue while balancing nitrogen levels during workouts