glutathione is a tripeptide (GSH) naturally occurring antioxidant — a composed of glutamine, cysteine, and glycine. Here's what makes it a key consideration in longevity-focused care: → A naturally occurring compound central Setria Glutathione: The Nature-Identical Tripeptide
Description
Also, note that localization and degron tags are a bit different in this regard

It is available to us in our diets, derived almost exclusively from proteins, and yet only 2 of the 20 amino acids normally present in proteins contains sulfur

Key Health Benefits: Anti-aging benefits by stimulating telomerase Improved sleep quality Immune system support Antioxidant properties Potential cance

Nature Reviews Molecular Cell Biology, 16(7), 397408