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Peptides are tools, not stand-alone muscle-building drugs

In the future, greater use of pragmatic clinical trials for assessing the therapeutic value and adverse effect profiles of medications will be employed to enhance the speed and reduce the cost of the increasing numbers of trials needed

White or off-white powders indicate an absence of copper or a failed chelating process

So even the topical route, which is the evidence-backed one, should be described as supported by small, sometimes industry-affiliated human cosmetic studies with modest effect sizes, not as proven. The correct posture toward topical GHK-Cu is cautious optimism grounded in real but imperfect human data which is still a materially stronger position than the injectable route can claim