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He constantly tests his biomarkers and tweaks his protocols, with data driving every move

A five-year, randomized, double-blind, placebo-controlled trial in healthy Danish older people (ages at inclusion, 60-74 years) found that selenium supplementation (100-300 g/day) had little-to-no impact on circulating levels of antioxidant enzymes, including GPx (166)

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The peroxidase activity reduces the hydroperoxide into a hydroxyl group using GSH as a source of reducing equivalents

This can be more reliable than oral supplements, which require daily adherence and may not be absorbed efficiently