A research-grade source publishes a per-batch COA, names a purity figure, and labels the product for research use only
In BV-2 microglial cells, CPT restored ATP, NAD/NADH, and glutathione levels, reduced intracellular and mitochondrial ROS, and prevented lipid peroxidation
A 2019 systematic review by Dilokthornsakul and colleagues in the Journal of Cosmetic Dermatology searched five databases through October 2017 and included four clinical studies (three placebo-controlled RCTs and one single-arm trial) evaluating oral glutathione 250-500 mg/day and topical 2% oxidized glutathione, concluding that evidence for skin-whitening effects remained inconclusive due to inconsistent findings across trials and the limited bioavailability of oral GSH with no significant effect observed in sun-protected skin areas
Fontanella C, Ongaro E, Bolzonello S, Guardascione M, Fasola G, Aprile G