L-Cysteine is a nonessential amino acid that can be produced from methionine and serine. L-Cysteine is involved in the synthesis of proteins. L-Cysteine is important to the maintanence of the cellular redox state. This means, that during certain periods, a depletion of glutathione may occur which allows the tissues to be exposed to oxidative stress, which in turn corrupts cell integrity. L-Cysteine is responsible for manufacturing glutathione which can prevent this degradation.
At the time, there have been no recorded drug interactions with the usage of l-cysteine. However, when zinc and l-cysteine combine, there is an increase in the absorption of zinc while vitamin C may hinder the oxidation of l-cysteine into l-cystine.
There have been no reported side effects when taking l-cysteine. As with all drugs and supplements, consult a health care professional before use.
N-Acetyl-Cysteine, or NAC, is a more stable form of the amino acid, l-cysteine. NAC is considered both an amino acid and an antioxidant. NAC forms the antioxidant, glutathione, which is important to the liver. NAC is an important part of proper body function, as the amino acid is connected to metabolism as well respiration support. A health care professional should be consulted before using.
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