Glutathione is a tripeptide (GSH) naturally produced in every cell of the body. It is the most abundant endogenous antioxidant, playing a central role in neutralising free radicals, regenerating other antioxidants (vitamins C and E), supporting liver detoxification pathways, and modulating immune function. Research has documented significant decline in intracellular glutathione levels with age and in chronic disease states. Injectable glutathione bypasses gut absorption limitations to deliver the compound directly into circulation.