GNC L-Arginine 1000 mg - Capsules The amino acid arginine has several roles in the body, such as helping remove ammonia from the body, which is a waste product of protein metabolism. Arginine is also an essential precursor of nitric oxide, which helps maintain blood vessel tone.* • Essential precursor of nitric oxide.* • Helps maintain healthy blood vessel tone.* • 90 capsules / 90 servings

GNC L-Arginine 1000 mg - Capsules The amino acid arginine has several roles in the body, such as helping remove ammonia from the body, which is a waste product of protein metabolism. Arginine is also an essential precursor of nitric oxide, which helps maintain blood vessel tone.* • Essential precursor of nitric oxide.* • Helps maintain healthy blood vessel tone.* • 90 capsules / 90 servings