Light exposure can degrade the preservative and potentially other components
That being said, were proponents of gentle skin brightening products that wont alter your skin tone, but rather, polish and illuminate it
This information on glutathione came from the textbook "Biochemistry", by Lubert Stryer, Try the links in the MadSci Library for more information on Biochemistry.
Benzene, a carcinogen, has been detected in over 40 spray deodorants, antiperspirants, and body sprays
NSAIDs have been found to impact glutathione levels in several ways: Increased Demand for Detoxification: NSAIDs are metabolized primarily in the liver, where they undergo biotransformation before being excreted
Article: What Are The Benefits of Combining Glutathione with NAC