Copper peptides have quickly become one of the most talked about ingredients in skincare and haircare. But if you've started researching them, you've probably noticed two names appearing over and over again: GHK-Cu and AHK-Cu.

Although they both belong to the copper peptide family, they aren't interchangeable. Each peptide interacts with the body in a different way, making one better suited for skin rejuvenation and the other for supporting healthy hair and scalp function.

Understanding the difference can help you choose products that better match your goals.

 

What is a copper peptide?

Peptides are short chains of amino acids that act as messengers in the body, helping to trigger processes like repair and renewal. When combined with copper, they support healthy skin and hair by encouraging the body's natural regenerative functions rather than simply masking concerns.

The important thing to remember is that each copper peptide has its own role.

 

GHK-Cu: Supporting healthier, younger looking skin

GHK-Cu is the best known copper peptide and is naturally found in the body. As we age, our levels gradually decline, which is one reason it's become such a popular ingredient in advanced skincare.

It works by encouraging the skin to produce collagen and elastin, two proteins that help keep skin firm, smooth and resilient. It also supports the skin's natural repair process, helping improve texture, soften the appearance of fine lines and promote a healthier, more radiant complexion.

 

AHK-Cu: Designed for the scalp and hair

While GHK-Cu is known for its skin benefits, AHK-Cu is better suited to supporting the scalp and hair follicles.

Research suggests it helps create a healthier environment for hair growth by supporting the active growth phase of the hair cycle. This makes it a popular choice for those looking to improve the appearance of thinning hair or maintain fuller, healthier looking hair over time.

 

Why does it matter?

Many products simply list "copper peptides" on the label without specifying which one they contain. While that may sound impressive, the type of copper peptide makes all the difference.

If your goal is healthier, firmer skin, GHK-Cu is the ingredient to look for. If you're focused on supporting your scalp and promoting stronger looking hair, AHK-Cu is the better choice.

With Infinity Skincare, we've taken a targeted approach. Our Copper Peptide GHK-Cu Face Serum is formulated to support skin rejuvenation, while our Copper Peptide AHK-Cu Scalp Serum is specifically designed to support scalp health and healthier looking hair.