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Glutathione peroxidase is an important enzyme that helps protect against oxidative stress and is linked to immune and sleep health, with lower levels associated with issues such as insomnia
If carnitine supplementation is coupled with supplemental intake of lysine (and to a lesser degree, methionine), a smaller dose of carnitine can be taken, which should forestall any side effects
L-Carnitine formulas should be checked for assay, loss on drying, particle size, flowability, taste, odor, heavy metals, and microbiology
10 In humans, oral doses of GSH 15 mg/kg increased plasma GSH 1.5- to 10-fold over the basal concentration in 4 of 5 volunteers tested