A prolonged deficiency is otherwise known as scurvy. And no, scurvy is not limited to pirates and sailors, but it was way back in 1747 that James Lind deduced through a trial on sailors (who were very likely to suffer from it), that oranges and lemons treated this mysterious illness
Impaired redox signaling in Huntingtons disease: therapeutic implications
Look for suppliers providing Certificates of Analysis (CoA) for each batch, detailing assay purity, heavy metal limits, residual solvents, and endotoxin testing
Beyond direct scavenging, L-Glutathione is the essential cofactor for a family of highly specialized antioxidant enzymes known as Glutathione Peroxidases (GPx)
GSH and associated redox status have been reported to play an important role in cellular signaling pathways involved in many physiologic processes in plants under both optimal and stress conditions 21