how much glutathione daily L-Glutathione 500 mg, 30 Capsules (17970) Quicksilver Scientific Glutathione - Cacao

It is well-tolerated by most people, and it does not interact with other medications

A notable study conducted by researchers at Penn State University followed participants who took oral glutathione daily for six months

"Tolerable Upper Intake Levels For Vitamins And Minerals" (PDF)

The study protocol was approved by the medical ethics committee of the Maastricht University Medical Center+, the Netherlands and was in line with the Helsinki Declaration of Human Rights (identifier: NL73600.068.20/METC 20033)

[Abstract] PLoS Genet

In autophagy-deficient cells, intracellular iron and lipid peroxidation were decreased, resulting in cells that could become resistant to erastin-induced ferroptosis [70]