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Glutathione Content in Foods and Dietary Sources of Glutathione

glutathione
A tripeptide comprised
of three amino acids (cysteine, glutamic acid, and glycine) present in most
mammalian tissue. Glutathione acts as an antioxidant, a free radical scavenger
and a detoxifying agent. Glutathione is also important as a cofactor for the
enzyme glutathione peroxidase, in the uptake of amino acids, and in the
synthesis of leukotrienes. As a substrate for glutathione S-transferase, this
agent reacts with a number of harmful chemical species, such as halides,
epoxides and free radicals, to form harmless inactive products. In erythrocytes,
these reactions prevent oxidative damage through the reduction of methemoglobin
and peroxides. Glutathione is also involved in the formation and maintenance of
disulfide bonds in proteins and in the transport of amino acids across cell
membranes

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