Pure Muscle X paves the way for lean muscle building by giving your an advanced, medical-grade blend of pure and all natural performance enhancing ingredients. This formula helps you increase your nitric oxide (NO) levels as which stimulates enhanced cardiovascular function. NO is a vasodilator so it expands the walls of your blood vessels to help increase the volume of blood flowing through your veins. This increases the deliver of oxygen, protein and energy so you muscles get what they need most faster. Accelerate your results with a proven effective nitric oxide boosting stamina enhancer.