1) MFL is our all Natural line with no Artificial Ingredients. 2) Stevia sweetened. MUSCLE XPLOSION is an explosive pre-workout igniter designed to give you explosive gains in muscle size, hardness, strength and endurance. This intense formula is built to give you extreme energy, greater muscular endurance, maximum strength, muscle growth, sharp focus and massive muscle pumps. It has been developed to deliver an explosive workout performance, helping you achieve a training level beyond your own limits!