For detailed information about glutathione's effects and considerations, particularly regarding skin applications, you can review the medical literature: Glutathione as a skin whitening agent: Facts, myths, evidence, and controversies
When toxic exposure, gut-derived inflammation, low zinc, oxidative stress, low SAM or elevated SAH exceed the livers metabolic reserve, detoxification may become less efficient and contribute to fatigue, brain fog, mood symptoms and toxic overload
Oral or intravenous (IV) glutathione supplementation may be used to increase glutathione levels
Although metformin is extremely efficient, its absorbtion is poor and variable
The IV delivery puts a high dose where your body can actually use it pills are notoriously poorly absorbed
Affinity chromatography Principles and methods, Handbooks from GE Health care, Page no.10, October 2007 Fanali, Salvatore