"Jarrow Formulas Arginine-Citrulline Sustain is a synergistic combination of sustained-release arginine and citrulline in equal amounts plus vitamin C to support the vascular production of nitric oxide (NO), promote blood flow, and support cardiovascular health."Dietary Considerations Wheat Free Dairy/ Milk Free Gluten Free Vegetarian Soy Free Vegan Egg Free Shellfish Free Fish Free Tree Nut Free Peanut FreeSuggested UseTake 2 tablets 1 to 2 times per day on an empty stomach prior to meals, or as directed by your qualified healthcare professional.Serving Size:2 Tablet Servings Per Container: 60 Amount Per Serving % Daily Value Vitamin C (as Calcium Ascorbate) 10 mg 10% L-Arginine (Free Base) 500 mg L-Citrulline (Free Form) 500 mg Other IngredientsHydroxypropylmethylcellulose, microcrystalline cellulose, silicon dioxide, magnesium stearate (vegetable source), coating (hypromellose, microcrystalline cellulose, stearic acid [vegetable source])WarningsNo wheat, no gluten, no soybeans, no dairy, no egg, no fish/shellfish, no peanuts/tree nuts. Suitable for vegetarians/vegans. Note: If you have a medical condition (especially hypotension or herpes), are pregnant, lactating, trying to conceive, under the age of 18, or taking medications, consult your healthcare professional before using this product. Keep out of the reach of children. Store in a cool, dry place.