Selected batches are independently tested by Janoshik Analytical, with reports published on the product page
Animal studies show substantial evidence across stroke models (full functional recovery in spatial memory, motor coordination, balance), Parkinsons models (protection of dopaminergic neurons, near-complete prevention of mortality), multiple sclerosis models (significantly less brain damage), and traumatic brain injury (reduced hemorrhage and edema)
Disregarding the Right Form of Glutathione Most individuals do not pay attention to the form of glutathione used in a supplement
That is what holotranscobalamin (holoTC) will pick up
If you pursue skin lightening, understand that results vary and some regulators do not endorse injections for cosmetic purposes
Cerebellum 11:777807 Ming X, Johnson WG, Stenroos ES, Mars A, Lambert GH, Buyske S (2010) Genetic variant of glutathione peroxidase 1 in autism