Skin School

What Ingredients Should Not Be Used With Copper Peptides

Learn which skincare ingredients should NOT be layered with copper peptides — including vitamin C, retinol, and strong acids — and discover how to use these actives safely with proper timing and co...

How to Layer Copper Peptides With Retinol, Vitamin C & Other Actives

Learn smart layering with copper peptides and other powerful actives. This guide explains how to use copper peptides with retinol, vitamin C, acids, and hydrators — including order of application, ...