N-Acetyl L-Cysteine (NAC), Glutathione - Liver Support - Dose

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N-Acetyl L-Cysteine (NAC), Glutathione - Liver Support - Dose

L-Cysteine is the most abundant nutrient in human hair ... comprising about eight percent.  Deficiency can lead to unhealthy hair and/or hair loss and dandruff.

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.  N-acetyl-cysteine is the acetylated form of L-cysteine, which is more efficiently absorbed and used.54-64 (see references below)

Glutathione (gamma-L-glutamyl-L-cysteinyl-glycine) is a peptide (short protein-like molecule) synthesized in the body from three amino acids L-glutamic acid, L-cysteine, and glycine.  Glutathione is one of the body's most important and powerful antioxidants, helping to detoxify xenobiotics (anything the body does not produce, nor are they part of a normal diet).  A major function of vitamin C is to keep glutathione in its reduced form so that they can continue to provide free radical quenching effects.65-68

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 high doses of glutathione.65-68

The liver is a large glandular organ, whose functions include storage and filtration of blood, secretion of bile, detoxification of various substances, and conversion of sugars into glycogen, which it stores.  The liver is also responsible for processing many vitamins and nutrients into a form that can be utilized by the body, and processing many toxic chemicals for elimination.

Modern living involves daily exposure to substances that are toxic to our bodies, which imposes a heavy load on the liver.  Therefore, a healthy liver is critical to well-being. Certain lifestyle risks and medical conditions make it all the more important to ensure that the liver is being maintained at its functional best.

In Europe and Asia, herbal liver tonics have been in common use for centuries.  The effectiveness of the herbs used has been validated during the past decades through modern research and clinical studies. These herbs generally contain antioxidants, cell membrane stabilizing agents, bile secretion enhancing compounds, or nutrients that prevent depletion of endogenous antioxidants such as glutathione.  Hepato-protection is beneficial not only for the liver, but for the overall health and vitality of our body.

N-acetyl cysteine is the more efficiently absorbed and used form of the amino acid, L-cysteine. L-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. N-acetyl cysteine has antioxidant properties, and helps to maintain healthy levels of the livers natural detoxifier, glutathione.  In addition, N-acetyl cysteine has been used to break up pulmonary and bronchial mucus.54-63 (see references below)


Supplement Facts:  Serving Size - 1 cap.  Servings/Container - 60.  Amount/Serving

N-Acetyl L-Cysteine

600 mg

Other Ingredients:
  Magnesium stearate, stearic acid, gelatin, water.

This product contains NO milk, egg, fish, peanuts, crustacean shellfish (lobster, crab, shrimp), soybeans, tree nuts, wheat, yeast, gluten, corn, or rice.  Contains NO sugar, and no artificial sweeteners, flavors, colors, or preservatives.

Dosage and Use:  Take one capsule one to three times daily with or without food, or as recommended by a healthcare practitioner.  When taking N-acetyl cysteine it is recommended that two to three times as much vitamin C (included in Anti-Alcohol Antioxidants) be taken at the same time.

Caution:  Those who supplement with NAC should drink water daily in order to prevent cysteine renal stones.  Cysteine renal stones are rare but do occur.


  • Keep out of reach of children,

  • Do not exceed recommended dose,

  • If you have a bad reaction, discontinue use immediately,

  • When using N-Acetyl L-Cysteine, please inform your physician.

54. Acta Biochim Pol. 2004;51(2):405-13.
55. Eur J Hum Genet. 2003 Jan;11(1):23-9.
56. Cornea. 2002 Mar;21(2):164-8.
57. Immunology. 2001 Dec;104(4):431-8.
58. Eur Respir J. 1997 Jul; 10(7): p1535-41.
59. J Immunol. 1994 Jun 15;152(12):5796-805.
60. Biochem Pharmacol. 1992 Mar 3;43(5):961-4.

61. Clin Pharmacokinet 1991 Feb; 20(2):123-34
62. Thorax. 1991 Jan;46(1):39-42.
63. Klin Wochenschr. 1991 Nov 15;69(18):857-62.
64. J Pharmacol Exp Ther. 1986 Feb;236(2):526-34.
65. Wien Klin Wochenschr 2000 Jul 28;112(14):610-6
66. Nutr canc. 2001;40(2):205-10.
67. J Nutr 2002 Feb;132(2):307-9.
68. Ann Biol Clin 1996; 54:5,181-7.

Pricing Information:  N-Acetyl-l-Cysteine | Kudzu Herb Supplements | L-Glutamine

More Information:  N-Acetyl L-Cysteine (NAC) -- Gambling Addictions, Addictive Behavior Support | HepatoPro
Diabetes & Alcohol | Fatty Livers, Alcohol, & Artichoke | Liver Efficiency Formula

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