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Evidence exists for individual ingredients through separate clinical and preclinical studies, but the blend as a combined injectable preparation has not been formally evaluated in a controlled trial
However, cost and time commitment substantial making this approach primarily for professional or serious amateur athletes
J Allergy Clin Immunol 137(1):301304
This damage can also be brought on or made worse by the picking, squeezing, and popping that often accompanies active acne
Researchers designing a GHK-Cu spray protocol often cite these three papers as foundational background reading
Conversely, the randomized, placebo-controlled, phase 3 study by Elkind-Hirsch et al
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