N.O. Pro Four Capsules Daily, 120ct, Veggie Capsule -N.O. Pro is a naturally formulated nitrous oxide formula designed to give you the maximum possible pump for your workout. -DO NOT take if you are under the age of 18 DO NOT exceed Two servings daily. Ingredients; L-Arginine HCl 1200mg Arginine alpha-ketoglutarate (AAKG) 1200mg Citrulline Malate (2:1) 610mg Beet Root (Beta vulgaris) 160mg Other Ingredients: cellulose (vegetable capsule), vegetable magnesium stearate, silica.