L-cysteine is a conditionally essential amino acid, one of only three sulfur-containing amino acids, the others being taurine (which can be produced from L-cysteine) and L-methionine from which L-cysteine can be produced in the body by a multi-step process. Cysteine plays a role in the sulfation cycle, acting as a sulfur donor in phase II detoxification and as a methyl donor in the conversion of homocysteine to methionine. Cysteine also helps synthesize glutathione, one of the body’s most important natural detoxifiers.85
Glutathione (gamma-L-glutamyl-L-cysteinyl-glycine) is a peptide-like (short-protein) molecule synthesized in the body from the three amino acids L-glutamic acid, L-cysteine and glycine. Glutathione is one of the body’s most important and powerful antioxidants,106 helping to detoxify xenobiotics.107-110 A major function of vitamin C is to keep glutathione in its reduced form so that it can continue to provide free radical-quenching effects.111-116
Even though many published studies show that garlic, selenium, alpha-lipoic acid, L-cysteine, and N-acetyl-cysteine can boost cellular glutathione levels, people with health problems may benefit from taking glutathione.106,114-116
*Percent Daily Values are based on the 2000 Calorie Diet. Your daily values may be higher or lower depending on your calorie needs. **Daily value not established.
Other Ingredients: gelatin, water, rice flour, magnesium stearate.
Contains: corn and rice.
Contains no: milk, egg, fish, peanuts, crustacean shellfish (lobster, crab, shrimp), soybeans, tree nuts, wheat, yeast, or gluten. Contains NO sugar, and no artificial sweeteners, flavors, colors, or preservatives.
Directions: Take one capsule one to three times daily on an empty stomach, or as recommended by a healthcare practitioner.
Caution: When taking N-acetyl cysteine it is recommended that two to three times as much vitamin C be taken at the same time. Failure to do so may result in more harm than good from taking this product because of the prolonged presence of the oxidized L-cysteine.*
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The majority of the product information has been reprinted from the manufacturer.