N-Acetyl-Cysteine

Antioxidant that is helpful against viruses

600 mg 60 Capsules , Code 215

$19.95

N-acetyl-cysteine, derived from the simple amino acid cysteine, provides significant protection against a broad array of modern toxins.

Supplementation with N-acetyl-cysteine thus helps the body produce glutathione at more beneficial levels. Glutathione is often considered the body’s most important antioxidant because of its location within the cell, which enhances its ability to neutralize free radicals.

N-acetyl-cysteine helps protect the liver from potentially adverse effects of exposure to a broad range of toxic chemicals, including those chemicals that can poison the body through cumulative use.

N-acetyl-cysteine is the acetylated form of L-cysteine which is more efficiently absorbed and used. It is also an antioxidant that is helpful against viruses. N-acetyl-cysteine has been used as a liver protectant and to break up pulmonary and bronchial mucus. N-acetyl-cysteine can boost glutathione levels in cells.

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. L-cysteine can act as an antioxidant, may prevent liver diseases, and can help to thicken the individual diameters of existing hair if taken regularly.

Glutathione (gamma-L-glutamyl-L-cysteinyl-glycine) is a peptide (short protein)-like 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. A major function of vitamin C is to keep glutathione, L-cysteine, and N-acetyl-cysteine in reduced form so that they can continue to have their powerful free radical quenching effects.

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 glutamine. Those with cataracts or liver disease may want to take 500 mg a day of this very potent antioxidant.

N-acetyl-cysteine is the more efficiently absorbed and used form of L-cysteine. N-acetyl-cysteine can act as an antioxidant and is helpful against viruses. N-acetyl-cysteine has been used as a liver protectant and to break up pulmonary and bronchial mucus. N-acetyl-cysteine can boost glutathione levels in cells and is an FDA-approved prescription drug sold under the tradename “Mucomist” to treat acetaminophen induced liver injury.

1 capsule contains:
600 mg of pure N-acetyl-cysteine.

Other ingredients: magnesium stearate, gelatin, and water.

Dosage and use
- One to three capsules daily are suggested.
- This product may be taken with or without food.

Caution:
When taking L-cysteine, N-acetyl-cysteine, or glutathione, it is recommended that three times as much vitamin C should be taken at the same time to prevent these amino acids from being oxidized in the body.

LE Magazine August 2004

N-acetyl-cysteine,
A Potent Antioxidant that Protects Against Harmful Toxins
By Stephen Laifer

Entering the twenty-first century, one of our greatest health threats is pollutants. Uncounted toxic chemicals pollute what we eat, drink, and breathe. The battle against toxins is largely waged in the liver. Despite being the largest glandular organ, the liver still bears a disproportionate burden in ridding the body of toxins. Those pollutants that cannot be processed and disposed of are stored in fatty tissues, first in the liver and then in other parts of the body. Over time, this can cause long-term harm to the liver.

A Powerful Antioxidant
N-acetyl-cysteine, derived from the simple amino acid cysteine, provides significant protection against a broad array of modern toxins. These include acrolein (found in cigarette smoke and auto exhaust), paraquat (a toxic herbicide), and the side effects of cyclophosphamide, adriamycin (both anticancer drugs) and halothane (an anesthetic).

Research indicates that in addition to providing toxin protection, N-acetyl-cysteine is a selective immune system enhancer, improving symptoms and preventing recurrences of common lung-related illnesses such as chronic bronchitis.1 N-acetyl-cysteine may further protect lung tissue against other conditions through its antioxidant activity.2

Among the most damaging pollutants in the human body are reactive oxygen intermediates. More commonly called “free radicals,” these are the toxic waste products of normal cellular metabolism. Left unchecked, free radicals interrupt the cellular regenerative process, eventually damaging cells. Free-radical-mediated mechanisms have also been suggested as contributing to the development of several neurodegenerative diseases,3,4 and are even suspected of being a major factor in the body’s aging process.

Antioxidants scavenge free radicals, effectively neutralizing them and contributing to more-efficient liver function. Antioxidants may also improve food quality and stability by inhibiting the free radical oxidation of food during its processing and storage.5 N-acetyl-cysteine is a vital antioxidant whose demonstrated beneficial characteristics include the scavenging of potent hydroxyl radicals and diminished production of hydrogen peroxide (H2O2).6

Effects on Glutathione
In addition to these beneficial properties, N-acetyl-cysteine helps the body convert and synthesize glutathione, an amino acid compound that consists of glycine, L-glutamic acid, and L-cysteine, and is found in every cell. While glycine and L-glutamic acid are plentiful in our diets, the amount of glutathione our bodies can produce is limited by their store of cysteine, which sometimes is in short supply. Supplementation with N-acetyl-cysteine thus helps the body produce glutathione at more beneficial levels.

Intracellular glutathione levels affect the ability of lung phagocytes—white blood cells that ingest and destroy bacteria and cellular debris—to do their job properly. Glutathione’s ability to scavenge free radicals enhances cellular function while helping the liver remove chemicals (such as drugs and pollutants) that are foreign to the body.

Glutathione is often considered the body’s most important antioxidant because of its location within the cell, which enhances its ability to neutralize free radicals. Increased glutathione levels have demonstrated particularly positive effects on those with severely depleted immune systems, such as HIV patients.7,8 Normal glutathione levels also show promise in the treatment of several lung disorders.9

The cell membrane lipid bilayer (blue) being damaged by oxygen free radicals (red and white clusters).

Other Benefits
The list of conditions that can be improved with N-acetyl-cysteine supplementation seems to grow each year. For example, N-acetyl-cysteine recently was shown to reduce the proliferation of certain cells lining the colon, and it may reduce the risk of colon cancer in people with recurrent polyps in the colon.10 N-acetyl-cysteine has been used in connection with chronic obstructive pulmonary disease, angina pectoris, gastritis, and heart attack (intravenously immediately following a myocardial infarction).

More recently, patients with other neurodegenerative conditions including amyotrophic lateral sclerosis, multiple sclerosis, diabetic neuropathy, and Alzheimer’s disease have been treated with N-acetyl-cysteine. These treatment outcomes indicate that if improvement in antioxidant status occurs, the potential exists for arresting progression of the disease and, in some cases, even improving the sufferer’s condition. N-acetyl-cysteine, with its proven safety and various antioxidant capabilities, may be a promising new tool in the treatment of such disorders.

Benefits for the Kidney and Liver
N-acetyl-cysteine has demonstrated benefits for people with pre-existing kidney damage who are undergoing coronary angiogram tests and are at risk for further kidney damage from the injected dye used to visualize the coronary arteries. Oral administration of N-acetyl-cysteine reduced by 86% the incidence of kidney damage in people undergoing this procedure.11 Formation and recurrence of kidney stones may also be circumvented by N-acetyl-cysteine supplementation.12

Oral supplementation with N-acetyl-cysteine has even been used successfully in two cases to treat a rare syndrome known as pseudoporphyria that complicates kidney dialysis.13 The condition has no other known treatment.

The antioxidant activity of N-acetyl-cysteine helps protect the liver from potentially adverse effects of exposure to a broad range of toxic chemicals, including those chemicals that can poison the body through cumulative use. For example, N-acetyl-cysteine counteracts acetaminophen toxicity and has been routinely used at very high levels in hospitals for patients with acetaminophen poisoning. It has also been shown to be effective in treating liver failure from causes other than acetaminophen poisoning, including hepatitis and other drug toxicity.14

Supplementation Guidelines
While cysteine, the amino acid from which N-acetyl-cysteine is derived, is found in most high-protein foods, N-acetyl-cysteine is not derived from dietary sources. Optimal levels of supplementation are uncertain, but a considerable proportion of the research studies on N-acetyl-cysteine used 250-1,500 mg per day. According to one study, N-acetyl-cysteine may increase urinary zinc excretion,15 leading the study authors to recommend that zinc and copper be taken concurrently when supplementing with N-acetyl-cysteine for extended periods.

N-acetyl-cysteine has no demonstrated sedative or stimulant effects, and tolerance is excellent for the vast majority of people who take it regularly. As a potentially powerful antidote to our polluted environment, N-acetyl-cysteine is a simple yet profound way to help protect the body against the ravages of the modern industrialized world.

References
1. Boman G, Backer U, Larsson S, Melander B, Wahlander L. Oral acetylcysteine reduces exacerbation rate in chronic bronchitis: a report of a trial organized by the Swedish Society for Pulmonary Diseases. Eur J Respir Dis. 1983 Aug;64(6):405-15.

2. van Schayck CP, Dekhuijzen PN, Gorgels WJ, et al. Are anti-oxidant and anti-inflammatory treatments effective in different subgroups of COPD? A hypothesis. Respir Med. 1998 Nov;92(11):1259-64.

3. Gotz ME, Kunig G, Riederer P, Youdim MB. Oxidative stress: free radical production in neural degeneration. Pharmacol Ther. 1994;63(1):37-122.

4. Olanow CW. A radical hypothesis for neurodegeneration. Trends Neurosci. 1993 Nov;16(11):439-44.

5. Yu L. Free radical scavenging capacity of wheat extracts. Paper presented at: IFT 2001 Annual Meeting; June 23-27; New Orleans, LA.

6. Aruoma OI, Halliwell B, Hoey BM, Butler J. The antioxidant action of N-acetyl-cysteine: its reaction with hydrogen peroxide, hydroxyl radical, superoxide, and hypochlorous acid. Free Radic Biol Med. 1989;6(6):593-7.

7. Kinscherf R, Fischbach T, Mihm S, et al. Effect of glutathione depletion and oral N- acetyl-cysteine treatment on CD4+ and CD8+ cells. FASEB J. 1994 Apr 1;8(6):448-51.

8. Roederer M, Staal FJ, Ela SW, Herzenberg LA, Herzenberg LA. N-acetyl-cysteine: potential for AIDS therapy. Pharmacology. 1993;46(3):121-9.

9. Morris PE, Bernard GR. Significance of glutathione in lung disease and implica- tions for therapy. Am J Med Sci. 1994 Feb;307(2):119-27.

10. Estensen RD, Levy M, Klopp SJ, et al. N-acetyl-cysteine suppression of the proliferative index in the colon of patients with previous adenomatous colonic polyps. Cancer Lett. 1999 Dec 1;147(1-2):109-14.

11. Shyu KG, Cheng JJ, Kuan P. Acetylcysteine protects against acute renal damage in patients with abnormal renal function undergoing a coronary procedure. J Am Coll Cardiol. 2002 Oct 16;40(8):1383-8.

12. Fan J, Shen SJ. The role of Tamm-Horsfall mucoprotein in calcium oxalate crystallization. N-acetyl-cysteine—a new therapy for calcium oxalate urolithiasis. Br J Urol. 1994 Sep;74(3):288-93.

13. Vadoud-Seyedi J, de Dobbeleer G, Simonart T. Treatment of haemodialysis-associated pseudoporphyria with N-acetyl-cysteine: report of two cases. Br J Dermatol. 2000 Mar;142(3):580-1.

14. Ben-Ari Z, Vaknin H, Tur-Kaspa R. N-acetyl-cysteine in acute hepatic failure (non-paracetamol-induced). Hepatogastroenterology. 2000 May- Jun;47(33):786-9.

15. Brumas V, Hacht B, Filella M, Berthon G. Can N-acetyl-L-cysteine affect zinc metabolism when used as a paracetamol antidote? Agents Actions. 1992 Jul;36(3-4):278- 88.

These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease