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Transforming growth factor-beta receptor activation represents another key mechanism underlying GHK-Cu's effects on matrix synthesis and tissue remodeling

For competitive athletes, hexarelin (also called examorelin) is explicitly named as a prohibited growth-hormone-releasing peptide under WADA's Prohibited List in category S2 (Peptide Hormones, Growth Factors, Related Substances and Mimetics), banned at all times as a non-specified substance carrying a default four-year sanction

ARA-290: Often researched at dosages of 4mg per administration

However, when sourcing a research compound, one can acquire either the peptide alone (GHK) or the pre-complexed form (GHK-Cu)