L-Arginine found in SilverOnyx Nitric Oxide supplements is an amino acid which can be converted to nitric oxide. Our nitric oxide support supplement also contains a healthy dose of citrulline malate.Supplement Facts (per 2 Veggie Capsules): Niacin - 30mg Calcium (as Calcium Carbonate) - 30 mgL-Arginine - 400mgL-Arginine AKG 2:1 Extract - 400mgL-Citrulline - 200mgL-Citrulline Malate Extract - 200mgBeta Alanine - 80mgInactive Ingredients: Cellulose (Vegetable Capsule), Magnesium Stearate (Vegetable), Silicon Dioxide. Each batch of our SilverOnyx Nitric Oxide Arginine Supplement is proudly manufactured and bottled in the USA facility following strict GMP guidelines. For quality assurance, it is third party for potency, purity, and quality by an experienced dietary supplement laboratory.Do not exceed recommended dose. Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement. KEEP OUT OF REACH OF CHILDREN. DO NOT USE IF SAFETY SEAL IS DAMAGED OR MISSING. STORE IN A COOL, DRY PLACE.Natural, Gluten-Free, Non-GMONiacin, Calcium (as Calcium Carbonate), L-Arginine, L-Arginine AKG 2:1 Extract, L-Citrulline, L-Citrulline Malate Extract, Beta Alanine, Cellulose (Vegetable Capsule), Magnesium Stearate (vegetable), Silicon Dioxide.As a dietary supplement take two (2) capsules once a day. For best results take 20-30 min before a meal with an 8oz. glass of water or as directed by your Healthcare Professional.Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.