oral glutathione efficacy skin lightening randomized controlled trial A Chronocosmetic Approach to Treating Signs of Aging with Glutathione + Vitamin C IV
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doi: 10.1007/978-3-030-65768-0_1 131 Vander HeidenMGCantleyLCThompsonCB

doi: 10.1136/rmdopen-2016-000289 147 KerrGAujeroMRichardsJSaylesHDavisLCannonGet al
However, clinical studies and supplement guidelines provide helpful dosage ranges that are widely used and considered safe

The results showed that the tested extract was safe to use in a range of in vitro and in vivo studies
