Also, it's an effective deodorant and a medium spreading emollient
While there arent any observable trends between the testing methods, tests for single vitamins or biomarkers cost around $47
Theriogenology 186, 168174
For skin, they might pair glutathione with vitamin C and biotin
Glutathione functions through two primary mechanisms: direct scavenging of reactive oxygen species (ROS) and serving as a cofactor for glutathione peroxidase, a family of enzymes that neutralize hydrogen peroxide and lipid peroxides [2][4]
The evidence overwhelmingly indicates IV glutathione lacks adequate clinical support for skin brightening, with experts universally cautioning against its use while patients face substantial risks for minimal, temporary benefits