Westcoast Naturals Amino acid N-Acetyl-L-Cysteine capsule, 500 mg. Increases levels of the antioxidant glutathione for the maintenance of good health. NAC is produced in living organisms from the amino acid cysteine. Thus, NAC is a natural sulfur-containing amino acid derivative found naturally in foods and is a powerful antioxidant. These dual properties help repair oxidative damage in the body. Being a powerful anti-oxidant and cell detoxification co-factor, NAC works to eliminate your body of free radicals and heavy metals. This improves your cellular health tremendously. Allergy Information: contains no artificial preservatives, sweeteners or colours, dairy products, soy, corn, yeast, egg or wheat.Improves your cellular health tremendously. NAC works to eliminate your body of free radicals and heavy metals. NAC is produced in living organisms from the amino acid cysteine. Increases levels of the antioxidant glutathione for the maintenance of good health. Amino acid N-Acetyl-L-Cysteine capsule.