Since the response is dose-sensitive and even biphasic, careful studies test a spread of concentrations across several orders of magnitude rather than betting on one number
Tripeptide GSH consists of glutamate, cysteine and glycine
They recommend accompanying glutathione with the same amount of vitamin C for best absorption
Palmer CV, Bythell JC, Willis BL (2012) Enzyme activity demonstrates multiple pathways of innate immunity in Indo-Pacific anthozoans
It's produced sustainably from corn sugar and it's Ecocert approved
If you would like a written, no-obligation review of whether B12 injections, wider vitamin injections or IV vitamin therapy are right for you, book a free consultation at any of our clinics, and check that whoever treats you is listed on the JCCP register