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A clinical study treating crow's feet with GHK-Cu formulations showed substantial wrinkle reduction after 12 weeks, with skin biopsies confirming increased collagen in the upper dermis

The differences between oral and injectable BPC-157 for gut healing are shown below

The common standalone ladder starts at 0.25 mg once weekly, escalates every 4 weeks, and reaches a 2.4 mg weekly research-target dose from week 17 onward

Topical is the more evidence-supported route, especially for skin endpoints

Pharmacokinetic-pharmacodynamic modeling of ipamorelin, a growth hormone releasing peptide, in human volunteers

10.1186/s12964-020-0527-z [DOI] [PMC free article] [PubMed] [Google Scholar] Melhem H., Hansmannel F., Bressenot A., Battaglia-Hsu S