glutathione dosage im Get a Injection & Feel Refreshed Glutathione Injections: Benefits, Safety, Dosing

Both have some supportive evidence

Antiviral Res

The purity, concentration, and contamination profile of those products are not clinically verified

OPSS.org - BPC-157: A prohibited peptide and an unapproved drug: Details regulatory status, WADA ban, and unapproved drug classification

It's an ambiguity acknowledged by the review's authors, who state that more research is needed to clarify optimal amounts and to identify "sub-groups of individuals most likely to respond to particular nutrients or foods." Speaking with a doctor is your best first-line action to determine whether you could benefit from swapping dietary glutathione for a supplement, or vice versa

Composed of a sequence of 15 amino acids, the peptide can also be found in trace amounts in the gastric fluids of other mammals