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Either the GHK-CU isn't suitable for your biochemistry, your protocol needs adjustment, or an external factor is interfering
And beyond raising blood levels of active glutathione (GSH) for a healthy ratio to oxidized glutathione (GSSG), it needs to be a one-supplement solution in order to remove the guesswork that seems inherent in NAC supplementation
Kannan R, Mittur A, Bao Y, Tsuruo T, Kaplowitz N
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