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Topical GHK-Cu creams and serums have been studied extensively and they do work for surface-level skin improvement
Pathog Dis (2017) 75(7):ftx093
Cirrhosis can lead to liver cancer
The two are frequently paired because they act on complementary pathways, producing a more physiological GH profile
Long-term safety data: not available for any duration or route of administration in humans
However, they are also delicate compounds that require careful sourcing and precise formulation environments
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