The claims are not backed by science
Synthesized in the liver from amino acids cysteine, glycine, and glutamic acid, you can find glutathione in every single cell in your body
Standard Maintenance Protocol For general antioxidant support and wellness maintenance, typical protocols involve 600-1000mg administered once or twice weekly
Tsai CL, Chang WT, Weng TI, Fang CC, Walson PD
While the regulation of MTHFR activity is closely controlled by SAM at C-terminal regulatory domain, more studies indicated that the human MTHFR enzyme activity is also regulated by multiple phosphorylated sites on a serine-rich N-terminal extension region 20
These are valid questions and deserve complete answers