A copper peptide is a small chain of amino acids bound to a copper ion. Ours is copper tripeptide-1 (GHK-Cu) — a peptide that occurs naturally in the body and is one of the most-studied in skin science, researched for over four decades.

It has been studied for its role in:

• the look of firmer, more resilient skin
• a smoother, more refined surface
• a hydrated, healthy-looking finish

Day or night. Apply to clean skin, then follow with your moisturizer. Consistency is where it does its work.

The Renewal is designed to stand on its own. If you already use retinol or vitamin C, we recommend rotating rather than layering: keep The Renewal to its own days in your routine, and your other actives to theirs.

We recommend consulting your physician before introducing any new skincare during pregnancy or breastfeeding.

Not currently. We're focused on US fulfillment for our launch, with international shipping coming as we grow.

Unopened products are returnable within 30 days. For opened-product concerns, email support@codaskin.com — we'll work with you directly.