N-Acetyl Cysteine

Cysteine is a nonessential sulfur-containing amino acid. Sufficient amounts of cysteine are provided to our bodies from either the essential amino acid methionine, or the nonessential amino acid serine via transsulfuration reactions. Being an unstable organic compound, cysteine may also be derived from the amino cystine in times of increased physiological need. Cysteine does not need to be obtained from diet because of its relative abundance and distribution throughout the body.

Cysteine is present in nearly all sources of protein, with minute amounts also existing in body fluids and plants. The highest concentrations are found in alpha-keratin. [1] Alpha-keratin is a fibrous protein located throughout the body in various structural tissues. It is a principal constituent of digestive enzymes, fingernails, skin and hair.

Cysteine may slo be used for energy expenditure in humans. In times of elongated physical activities, cysteine is often converted into glucose. It is also of great importance in the production of taurine, another amino acid.

N-acetyl cysteine (NAC) is the most popular modified form of cysteine to be included for use in dietary supplements. In conjunction with L-cysteine, NAC has been recognized in the metabolization of various biochemicals in the body. These include; biotin, coenzyme A, heparin, lipoid acid, and perhaps of greatest importance, the antioxidant glutathione.

Cysteine may be considered conditionally essential in preterm infants. Healthcare providers often recommend a complete amino acid supplement, containing adequate amounts of cysteine, to be administered to these newborns.

Products Containing N-Acetyl Cysteine
Name Price Rating Serving Price # of Servings Manufacturer Health Condition
Oxynox $34.95
$1.17 30 Progressive Health Emphysema


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