glutathione mode of action Oral delivery glutathione: antioxidant function, barriers and strategies – ScienceOpen Glutathione: The “Master” Antioxidant –
Description
Injectable research protocols commonly reference GHK-Cu doses in the range of 1-2mg per administration, administered once daily or several times per week depending on the research design

Excellent This is great for the immune system, I highly recommend it

Dosing protocols for every body weight

Bruce Merrifield (Nobel Prize, 1984)
