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GHK-Cu is generally considered non-comedogenic, meaning it is unlikely to clog pores
Scientific Sources Pickart L, Vasquez-Soltero JM, Margolina A
The needles are typically quite thin and, therefore, less painful than you might expect
Human-Relevant Research Applications
For the maintenance treatment of vitamin B12 deficiency, the usual dose is 60-100mcg SC/IM, given once per month
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