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doi:10.1016/j.jad.2010.12.019, PMID: 21277635 Maes M, Van de Vyvere J, Vandoolaeghe E, Bril T, Demedts P, Wauters A, Neels H (1996) Alterations in iron metabolism and the erythron in major depression: further evidence for a chronic inflammatory process

Others follow conservative USP guidelines that may actually give you less time than 21 days, depending on the formulation category

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Standard protocols use 1-4mg daily, representing a margin of safety exceeding 5,000-fold

Glutathione helps protect cells by neutralizing free radicals and supporting detoxification, promoting healthy cell function and recovery from daily stress