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Clinical studies have found that L-theanine, often combined with the amino acid cystine, may help reduce immune suppression associated with intense physical stress, support natural killer (NK) cell activity and enhance the bodys defense against common respiratory infections
IV glutathione is a common choice for certain groups of people
The Challenge of Aging and Stress As we age, our natural production of glutathione tends to decline
Carnitine transport and fatty acid oxidation
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