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Kawas, Joseph W

While supplement-grade thyroid glandular is labelled as containing thyroid tissue, its hormonal content is typically low and variable it is the tissue-specific factors, not pharmaceutical hormone replacement, that characterise its role as a dietary supplement.* Why 300mg

Importantly, supplementation can **increase** measurable NAD+ metabolism: in a 2018 randomized, placebo-controlled crossover trial published in Nature Communications by Martens and colleagues at the University of Colorado Boulder (24 healthy middle-aged and older adults), 1,000 mg/day of the NAD+ precursor nicotinamide riboside (500 mg, twice daily) elevated NAD+ in blood cells by roughly 60% versus placebo over 6 weeks, with no serious adverse events reported

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