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Oral Bioavailability Challenges A frequently cited 2015 randomized controlled trial published in the European Journal of Nutrition (N=54) found that oral glutathione supplementation at 250 mg/day and 1,000 mg/day for 6 months increased body stores of GSH by 30% to 35% compared to placebo, as measured in erythrocytes and buccal cells [6]

ProFLG is synthesized in the granular layer of the epidermis as a polyprotein that contains 1012 repeating domains in humans (Gan et al., 1990) but 20 repeats in the mouse (Rothnagel and Steinert, 1990) and rat (Haydock and Dale, 1990)

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