doi: 10.1016/S0033-0620(97)80037-0
Disappears upon discontinuation Insomnia if taken late: avoid taking after 4-5 PM, especially combined with caffeine Headaches rare at high doses If you experience digestive effects, split the dose (1 capsule morning + 1 capsule midday) or take during a meal generally improves tolerance
If one averages the effect on A1c of the highest doses for each drug in a specific drug class the reductions in A1c for each class of drug are metformin 1.09%, sulfonylureas 1.0%, TZDs 0.95%, DPP-4 inhibitors 0.66%, SGLT2 inhibitors 0.83%, and GLP-1 RAs 1.24%
Current evidence supports glutathione's potential as a depigmenting agent but underscores the need for rigorous, large-scale clinical trials to establish long-term safety, optimal dosing, and standardized applications, and until such data are available, clinicians and consumers should exercise caution to ensure safe and effective dermatological practices, particularly with intravenous use