I've read taking glutathione actually causes your body to stop making it on its own, and instead we should be supporting our body in ways to encourage it to up its own Glutathione deficiency induces epigenetic alterations of vitamin D metabolism genes in the livers of high fat diet fed obese mice Scientific Reports Glutathione: What It Is, Why You Need It, How You Can Increase It The Amino Company Glutathione & Diabetes: How the Body's Master Antioxidant