Though conventional wisdom and anecdotal evidence says that this property is helpful for dark under-eye circles and puffy eyes , we have to mention that the double-blind research we have found about a 3% caffeine gel concluded that " the overall efficacy of the selected caffeine gel in reducing puffy eyes was not significantly different from that of its gel base ." But you know, the proof is in the pudding
Sun exposure can raise levels, too, but less reliably than supplements
10.1016/s0254-6272(16)30065-6 128 WangW.ZhangW.LiD.QianR.ZhuL.LiuY.et al (2020)
And despite the inevitability that your glutathione declines with age, eating a nutritious diet, not smoking, and avoiding toxins will support healthful glutathione levels
What are the primary research applications
Sankar Bhattacharyya, Sidho Kanho Birsha University, India