@trendin.with.em: The best duo! #copperpeptides #firming #ghkcu #glowingskin #matureskin

Cassi⚡ :

I want to incorporate this, but the problem is that you can't use copper peptides at the same time as vitamin c or retinol. and then you also can't use vitamin c and retinol at the same time. most people only do skin care twice, so you only really can choose two of the actives... vitamin c and retinol have more research behind them. but I'm so torn because I really want to try copper peptides!