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Those seeing excellent systemic benefits but limited hair effects might add complementary interventions targeting hair specifically while continuing GHK-Cu for its broader regenerative value

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For an at-home routine, expect a hydrated, slightly smoother look in the first week or two that is largely surface and water, early texture and tone change by weeks three to four, the first genuine firming response from new collagen around weeks six to eight, and continued, slow improvement through months three to six with consistent use

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