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It comes in oral and injectable forms
However, the route matters: plasma GHK-Cu circulates systemically, while topical GHK-Cu formulations face a bioavailability challenge penetrating the stratum corneum barrier to reach dermal fibroblasts
Overactivation of GSK3 in diabetic conditions has been linked to mitochondrial dysfunction, enhanced oxidative stress, and upregulated -secretase activity, creating a cascade of neuronal injury 41,42,43
This is normal, expected, and still represents excellent progress
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