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topical ghk cu vs injectable ghk cu GHK-CU Other Copper Peptides: Complete Comparison Guide for Skin and Hair How Often to Inject GHK-Cu
Description
While individual experiences vary, the clinical trial data and pharmacological properties of cagrilintide suggest a general timeline

Because the peptide is highly active, increasing concentration does not always result in improved performance
American Journal of Clinical Nutrition 26, 1973
Yes, but fair skin requires longer loading periods (3-4 weeks instead of 1-2 weeks for darker skin types) and higher total cumulative doses (20-50 mg instead of 5-10 mg)

Prophylactic, preemptive, and curative treatment for sinusoidal obstruction syndrome/veno-occlusive disease in adult patients: a position statement from an international expert group
