Inosine Powder By Peak Performance Is A Naturally Occurring Organic Compound In Plants And Muscle Tissue. It Is Used In Enzymes That Regulate Muscular Contraction And Blood Flow. Inosine Is Believed To Increase The Oxygen-carrying Capacity Of Red Blood Cells And Improve Oxygen Delivery To Muscles Which In-turn Inhibits Lactic Acid Build-up. Product Details: - Increases Oxygen Carrying Capacity In Blood Cells And Improves Oxygen Delivery To Muscles - Reduces Lactic Acid Build Up - Natural And Organic Formula *1 Lb Container Provides A 90 Day Supply For One Horse.