The not for human consumption label is a legal disclaimer that also sidesteps the testing a product meant for injection would otherwise require
Injection removes the skin barrier that limits systemic copper exposure, delivering a copper complex past the guts regulated absorption step the same reason clinical teams dose intravenous copper an order of magnitude below oral intake
To stabilize itself, it rapidly binds to another oxidized glutathione molecule, forming the disulfide compound GSSG
Messarah M, Boumendjel A, Chouabia A, et al
10.1016/j.fertnstert.2024.09.038 38 ConfortiA.IorioG
When administered intravenously, glutathione is rapidly absorbed into the bloodstream, bypassing the digestive system and ensuring maximum bioavailability