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.