cofactor for glutathione peroxidase and the Cofactors Functional Mimics of Glutathione Peroxidase:

Intravenous administration allows for controlled dosing and monitoring throughout the infusion process

A major difference between the two is the patient population

In the case of pronounced absorption disorders, for example as a result of gastritis or after removal of the small intestine, in Crohn's disease, diverticulosis and the so-called blind-loop syndrome, there is a gradual decrease in the vitamin B12 store in the liver, which can turn into a manifest vitamin B12 deficiency

the peptide treatment touted by biohackers and longevity folks is a synthetic, injectable version designed to mimic this natural peptide