Now Arginine 500mg & Citrulline 250mg capsules support protein metabolism and muscle maintenance. These amino acids are integral to the urea cycle, aiding in ammonia detoxification. Ideal for athletes and fitness enthusiasts, this supplement acts as a nitric oxide precursor, enhancing workout performance. Key Features Supports protein metabolism Maintains muscle tissue Acts as a nitric oxide precursor Keto-friendly Non-GMO Vegan/Vegetarian GMP Quality Assured L-Arginine (Free-Form), L-Citrulline (Free-Form), Hypromellose (Cellulose Capsule), Silicon Dioxide, Stearic Acid (Vegetable Source).Now Arginine 500mg & Citrulline 250mg capsules support protein metabolism and muscle maintenance. These amino acids are integral to the urea cycle, aiding in ammonia detoxification. Ideal for athletes and fitness enthusiasts, this supplement acts as a nitric oxide precursor, enhancing workout performance.Take 1 Capsule 2 Times Daily.For Adults Only. Consult Physician If Pregnant/Nursing, Taking Medication (Especially Antihypertensives, Nitrates, Or Other Heart Medications), Or Have A Medical Condition (Especially Herpes, Kidney Impairment, And/Or Glaucoma). Keep Out Of Reach Of Children.