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ghk cu pinning vs topical GHK-Cu might be trending, but it's not new. Before you inject yourself with this viral peptide, consider this. This copper peptide has been studied for years in skin repair and collagen signalling GHK-Cu for Hair Growth: Protocols
Description
doi: 10.1016/S0140-6736(02)08761-5

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Most people don't know about Shemmy
Its not a peptide
