NAC (N-Acetyl-L-Cysteine)

by Allergy Research Group


An antioxidant closely related to L-cysteine, being its acetyl derivative. Cysteine is important for homeostasis, being a key antioxidant, a glutathione precursor, and a natural source of sulfur for metabolism. Yet L-cysteine is unstable, and can become degraded while being absorbed. N-Acetyl Cysteine, on the other hand, is more stable than L-cysteine and conveniently becomes converted into L-cysteine after being absorbed. Thus NAC taken orally will raise blood and tissue cysteine levels. As a dietary supplement, NAC is therefore a highly attractive alternative to L-cysteine.

Dr. Hoffman considers NAC to be a premiere antioxidant, and favors its use as the most orally absorbable glutathione precursor.


Each tablet contains: N-Acetyl-L-Cysteine 500 mg Available in bottles of 90 tablets. Hypoallergenic.

Suggested Use: As a dietary supplement, one (1) tablet one to three times per day, or as directed by a health practitioner.


The information and product descriptions appearing on this website are for information purposes only, and are not intended to provide medical advice to individuals. Consult with your physician if you have any health concerns, and before initiating any new diet, exercise, supplement, or other lifestyle changes.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


Qty Description Price
500 mg, 120 tablets $25.00


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information sheet by Allergy Research Group

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"Glutathione Therapy," An interview with Dr. David Perlmutter by Jill Selby

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Plant Sterols and Sterolins: Potential Immune System Modulators by Hoffman Center Staff

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SUPPLEMENTS FOR SURGERY by Dr. Ronald L. Hoffman, M.D., CNS

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Alzheimer's Disease by Ronald Hoffman MD, CNS

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Asthma Update by Ronald Hoffman, M.D., C.N.S.

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Cataracts: Inevitable or Avoidable? by Abel, Jr., M.D.

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Allergies: The Natural Approach by The Standard

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Free Radicals, Antioxidants And Eye Diseases: Not As Incurable As We Once Thought by The Standard

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Managing Cholesterol: Naturally by The Standard

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Atherosclerosis by Leyla Muedin, RD, CDN

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Chronic Obstructive Pulmonary Disease By Ronald L. Hoffman, MD, CNS and Leyla Muedin, RD, CDN

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Fatty Liver Disease by Leyla Muedin, RD, CDN

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Hepatitis by Leyla Muedin, RD, CDN

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