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(2018) documented that liposomal glutathione supplementation at 500-1000 mg daily elevated blood glutathione stores over 1-6 months in healthy adults (Sinha et al., 2018)

Here is what the clinical research shows and what supervised use actually looks like

Biochem J 2000

Antioxidant Power and Detoxification Support Your liver processes thousands of chemicals daily, and glutathione serves as its most trusted partner

The meta-analysis was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols (PRISMA-P)

NAC (N-acetylcysteine) is a glutathione precursor with ~30% bioavailability and is well-studied in thyroid disease