# peptide delivery

1 article.

- [GHK-Cu Topical vs Injectable Bioavailability](https://moleculenotes.com/clinical-evidence-and-mechanisms/ghk-cu-topical-vs-injectable-bioavailability.md): Explore GHK-Cu topical vs injectable bioavailability truth. Learn why injectables outperform serums for skin penetration. Read our science-backed analysis now.