National Skin Review

Buyer's guide
Australia & NZ
National Skin ReviewIndependent Buyer's Guide

The copper peptide serum boom, and what actually separates them

Four checks worth making before buying any copper peptide serum

Contents

  1. Overview
  2. Is the concentration on the label?
  3. How old is the bottle?
  4. Routine compatibility
  5. Is it sustainable?
  6. Our verdict
  7. References

Copper peptide serums have gone from a niche insider ingredient to one of the most talked-about categories in beauty. Look closely and the products are far from equal. This guide sets out the checks worth making before buying any of them.

1. Is the concentration on the label?

This is the fastest filter. Many serums say “with copper peptides” but never say how much. If a brand is proud of its dose, it prints it. Look for a clear figure, for example 1% GHK-Cu, on the label itself, not just the website.

2. How old is the bottle by the time you finish it?

Copper peptides are sensitive. Once a bottle is open, oxidation slowly chips away at potency.[1] A large 30ml bottle can take three to six months to finish, so the serum applied in month four is not the serum that was bought. Smaller bottles used fresh within about a month sidestep the problem, as Figure 1 illustrates.

Fresh 10ml, replaced monthly One 30ml bottle, opened for months 0246 Months after opening Relative potency
Figure 1. Relative potency after opening. A fresh small bottle replaced each month stays near full strength, while a large bottle used slowly declines as it oxidises.

3. Does it play nicely with the rest of your routine?

Two rules of thumb. Keep strong vitamin C at a different time of day to your copper peptides. And unlike retinol, copper peptides do not sting, flake or purge, which makes them a genuine option for skin that has become less tolerant with age.

4. Is the routine actually sustainable?

Consistency is the whole game. Twice a day, every day, for at least eight to twelve weeks. Formats that make that easy — a simple dropper, a thirty-second routine, a supply that arrives before you run out — are worth more than any exotic extra ingredient.

5. Our verdict

The copper peptide trend is deserved, but the wins go to buyers who check the dose, insist on freshness, and stick with it. One Australian brand, KYORS, has built its whole approach around exactly this: a stated 1% GHK-Cu on the label, delivered as a small 10ml bottle each month so it is always used fresh.

References

  1. Pickart L, Margolina A. Regenerative and Protective Actions of the GHK-Cu Peptide. International Journal of Molecular Sciences. 2018;19(7):1987.
  2. Pickart L. The human tri-peptide GHK and tissue remodeling. Journal of Biomaterials Science, Polymer Edition. 2008;19(8):969–988.
  3. Brincat M, Versi E, Moniz CF, et al. Skin collagen changes in postmenopausal women. British Journal of Obstetrics and Gynaecology. 1987.
  4. Australasian College of Dermatologists. Ageing skin: patient guidance.

This article is general information about cosmetic ingredients and the appearance of skin. It is not medical advice and does not describe the treatment of any condition. KYORS is a cosmetic skincare product intended to improve the look and feel of skin. It is not intended to diagnose, treat, cure or prevent any disease. Individual results vary.