What is L-Arginine & L-Citrulline?L-Arginine is an essential amino acid, while L-Citrulline is a non-essential amino acid. Both work together to help support your lifestyle. While amino acids can be obtained through certain food sources, it may be difficult to receive a concentrated dose, which is why many people turn to a supplement for additional support. How to Get Amino Acids:You can now find L Arginine and L-Citrulline in various forms such as pills, capsules, chewable tablets, lozenges, bulk powders, liquid drops, gummies, and more. Looking for a high quality formula that best suits your daily regimen? Berkshire Labs Nitric Oxide Max Precursor*:At Berkshire Labs, quick release capsules deliver 1,500 mg of a Nitric Oxide Precursor Matrix which feature 1,000 mg of L-Citrulline and 500 mg of L-Arginine per serving, plus Creatine Monohydrate for added support. It's gluten free and non-GMO, made with no artificial flavor, sweetener, or preservatives, making it a top supplement of choice for men and women looking to boost their routine. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.