It is not a dietary supplement, not an FDA-approved drug, and not intended for human or animal consumption
GR-2397: review of the novel siderophore-like antifungal agent for the treatment of invasive aspergillosis
also explains why absorption matters so much
L-Glutathione Reduced is a powerful antioxidant that supports cellular health, detoxification, and immune function
Abbreviations GSH: Glutathione PAL: Phenylalanine ammonia-lyase CAD: Cinnamyl alcohol dehydrogenase POD: Peroxidase PG: PGSC0003DMG40 SA: Salicylic acid IAA: Indole-3-acetic acid (auxin) JA: Jasmonic acid qRT-PCR: Quantitative real-time polymerase chain reaction References Liu R, Zhang ZH, Chen SJ, Wang ZH
S-acetyl glutathione may still be a practical choice for people who value capsule convenience, stability and consistent use