Figure 2 from Glutathione synthesis. Semantic Scholar Glutathione (GSH) and NAD are both critical for cellular health, energy, and repair. Yet, they function very differently in the body. The question I'm often asked is, "Which one do I need Reduced Glutathione GSH PLANTICINAL Glutathione and glutathione disulfide their biomedical and pharmaceutical applications Medicinal Chemistry Research Springer Nature Link