Definition of Cysteine:

A nonessential amino acid but may be essential for individuals with certain diseases or nutritional concerns.  Cysteine is a sulfur-bearing amino acid with antioxidant properties.  It is important for keratin synthesis, a protein found in skin, hair and nails and is a component of coenzyme A and glutathione.

Topics Related to Cysteine

Chromium Deficiency

...the condition
“ the active form of GTF are used in some formulas, but usually with chromium in lower doses, such as 50mcg, since it is thought to be better absorbed with niacin and the amino acids glycine, cysteine and glutamic acid...”

Coronary Disease / Heart Attack

...recommendation Cysteine / N-Acetylcysteine (NAC)
Cysteine is sometimes used to help lessen the risk of coronary artery disease.”
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More topics Related to Cysteine

Cysteine / N-Acetylcysteine (NAC) a treatment
“N-acetyl cysteine (NAC) is an altered form of the non-essential amino acid cysteine, which is commonly found in food and synthesized by the body...”

Cystine a treatment
“...The N-Acetyl form of Cysteine; helps prevent chemotherapy side-effects and radiation therapy side effects; increases glutathione levels in the lungs, kidneys, liver and bone marrow and has an anti-aging effect on the body...”

Essential Fatty Acids a treatment
“...EFAs form associations with the sulfhydryl group (cysteine) in proteins, important in reactions that make possible the one-way movement of electrons and energy on which life depends...”

Glutamine a treatment
“...Glutamine, along with N-acetyl cysteine (NAC) forms the most important natural compound in our body, glutathione...”


...related topic
“A natural sulfur-bearing peptide formed from the linking of three amino acids: glutamic acid, cysteine and glycine...”

Heavy Metal Toxicity

...recommendation Cysteine / N-Acetylcysteine (NAC)
Cysteine acts as a complexing agent by attaching itself to lead and carrying it out of the body...”
...recommendation L-Glutathione
“...The rate-limiting precursors are the amino acids cysteine (or N-acetyl-cysteine) and glutamine.”


...the condition
“...Licorice root, cysteine and glycine together have produced a 40% cure rate...”
...recommendation L-Glutathione
“Glutathione (500mg twice a day) or N-acetyl cysteine (200mg two to three times per day) provide liver cleansing and antioxidant support.”

High Total Cholesterol

...recommendation Cysteine / N-Acetylcysteine (NAC)
Cysteine is sometimes used to improve cholesterol ratios.”
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More topics Related to Cysteine


...recommendation Cysteine / N-Acetylcysteine (NAC)
“Deficiencies of the related amino acid cysteine have been reported in HIV-infected patients.”

L-Glutathione a treatment
“...While there is still some debate about the intestinal absorption of oral glutathione, serum levels of glutathione can be increased by the ingestion of N-acetyl cysteine (NAC)...”

Liver Detoxification / Support Requirement

...recommendation Alcohol Avoidance
“...Even though supplements of these nutrients, together with the amino acid cysteine, may help the liver detoxify acetaldehyde, it would be wiser to avoid alcohol, its primary source.”

Liver Detoxification Phase II Support a treatment
“...cysteine, glycine or a sulfur molecule) to a toxic chemical or drug, to render it less harmful...”

Liver Detoxification Profile a treatment
“...In addition, glutathione, glutathione peroxidase, superoxide dismutase, plasma cysteine, and plasma sulfate are assessed from fasting blood specimens.”

L-Taurine a treatment
“Taurine is a non-essential amino acid, synthesized in the body from methionine and cysteine.  It is useful to people who suffer from atherosclerosis, heart disorders, edema, hypertension, and hypoglycemia...”


...related topic
“...Important for proper growth in infants, nitrogen balance in adults, healthy nails and skin and the synthesis of taurine, cysteine, phosphatidylcholine (lecithin), bile, carnitine and endorphins...”

Parkinson's Disease

...recommendation Cysteine / N-Acetylcysteine (NAC)
“Both cysteine and NAC increase glutathione levels.”

Sulfur Requirement

...the condition
“...Most of the body's sulfur is found in the sulfur-containing amino acids methionine, cystine, and cysteine.  Vitamin B1, biotin, and pantothenic acid also contain small amounts of sulfur...”

Zeolites a treatment
“...Anything that improves the immune defense system such as selenium, Burbur, N-Acetyl Cysteine etc. appears to complement the effects of NCD...”
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