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it is naturally occurring, nontoxic, and is active at a very low nanomolar concentration.11 Another piece of research described GHK-Cu as a safe, inexpensive, extensively studied compound.3 These conclusions primarily apply to topical GHK-Cu, but even with injectables, the lack of serious adverse events in animal subjects points to a general tolerability regardless of the route of administration

Injectable or topical directly to the area (depending on wound type)

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The duration of the effects of glutathione injections can vary from person to person

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More importantly, the NO synthase blocker L-NAME can reverse these effects of AKT and p38/MAPK signaling pathways induced by BPC 157, but cause no changes on ERK/MAPK