can glutathione be taken orally What To Avoid When Taking Tablets: Full List Glutathione: Benefits and Supplements

It also serves as a carrier for copper, an essential cofactor for critical antioxidant enzymes like superoxide dismutase (SOD1)

(July 2016)

Even when intrinsic factor is not present to aid in the absorption of vitamin B 12 (pernicious anemia) or in other diseases that affect the usual absorption sites in the terminal ileum, oral therapy remains effective

Split dosing may help if: single morning dose produces effects that fade by afternoon, you are using higher doses (450-500mcg) where sustained levels may help, or evening administration fits your schedule better than early morning

Then other people are seeing that, and they're applying that in their own lives, too