ghk-cu norge – True Research Labs Copper Peptide GHK-Cu Beef Tallow:
Description
[Google Scholar] Acute toxic effects of polyethylene microplastic on adult zebrafish

The Ace-tubulin and Tyr-tubulin proteins were detected to examine stable microtubules and dynamic microtubules, respectively

The main difference is bioavailability at the target tissue

The safety argument is equally compelling