Citrulline is a non-essential amino acid that is an important intermediate in the urea cycle, functioning along with other amino acids to rid the body of ammonia, a byproduct of protein metabolism.* Citrulline also plays an important role in the healing process and in the maintenance of a healthy immune system.* Natural color variation may occur in this product.

During the summer months products may arrive warm but stores and ships products in accordance with manufacturers' recommendations, when provided. Packaged in the USA by a family owned and operated company since 1968. GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation). CERTIFICATIONS/CLASSIFICATIONS: Dairy Free, Egg Free, Kosher, Made without Gluten, Non-GMO, Nut Free, Soy Free, Vegan/Vegetarian. HEALTHY IMMUNE SYSTEM FUNCTION*: Plays an important role in the healing process and in the maintenance of a healthy immune system.*. VEGAN PURE POWDER/SUPPORTS PROTEIN METABOLISM*: A non-essential amino acid that is an important intermediate in the urea cycle, functioning along with other amino acids to rid the body of ammonia, a byproduct of protein metabolism.*.