GHK-Cu is a copper peptide naturally found in human plasma, saliva, and urine. It’s best known for its role in collagen production, gene modulation and reducing inflammation, which is why become a popular ingredient in skincare products. Early research indicates it could also be helpful in treating male pattern baldness.
In this blog, we’ll take a look at what the research says, how it compares to licensed treatments, and what you should keep in mind if you’re planning to add GHK-Cu to your routine.
What does the research say?
The peptides’ role in wound healing, ageing and DNA repair has been more extensively researched and is better understood than its potential benefits as a topical treatment for hair growth. So far, the evidence for hair growth is based mainly on animal studies, lab tests (considered ‘preclinical’ data) and small human trials.
Most of the data relating to its hair growth abilities actually dates back to the 1970s and 80s, when its regenerative properties were first discovered by scientist Loren Pickart.
GHK-CU is proposed to support hair growth through various mechanisms, including:
- Encouraging hair follicles to re-enter the anagen (growth) phase and shortening the telogen (shedding) phase.
- Supporting rapid cell division in cells that build the hair shaft.
- Upregulating genes which support hair growth in follicle cells, like VEGF.
- Anti-inflammatory properties – the role of inflammation in the development of male pattern baldness is increasingly validated by research, so the potential role of GHK-Cu in reducing scalp inflammation could be beneficial.
Most of these mechanisms have been validated through testing on cell cultures in labs or animal studies, rather than in human trials.
One of the few human trials in 2006 compared a 2% GHK-Cu to Minoxidil 5% Spray for androgenetic alopecia and found that the GHK-Cu did improve hair density compared to placebo, but the minoxidil produced better results.
You might also come across GHK-Cu, among other amino acids, vitamins, micronutrients and peptides, as one ingredient within a ‘hair cocktail’ injected directly into the scalp. Some aesthetic clinics are offering a procedure called mesotherapy as a treatment for hair loss, which involves microinjecting a blend of compounds thought to be beneficial for hair growth, directly into the scalp. Again, the research to support the practice is somewhat limited.
How does GHK-Cu compare to proven treatments?
While GHK-Cu has shown promise in laboratory and animal studies, the evidence base is much smaller than for established treatments like Finasteride and Minoxidil. Finasteride has been studied in thousands of men across multiple randomised controlled trials, while Minoxidil Spray has decades of clinical data supporting its effectiveness. By comparison, research on GHK-Cu for hair growth remains limited and consists mainly of preclinical studies and small human trials.
For that reason, GHK-Cu is generally best viewed as a potential addition to an evidence-based routine rather than a replacement for licensed hair loss treatments.
What to keep in mind if you’re thinking of using GHK-Cu
If you’re interested in trying out this ingredient to see if it could potentially boost your results alongside a routine with established treatments, we have a few tips you should keep in mind to make sure you’re using this peptide safely whilst getting the most from it.
Can GHK-Cu penetrate the skin barrier to reach the hair follicle cells?
The copper peptide appears to reach the dermal papilla cells (cells at the base of the follicle that regulate the hair growth cycle) using the hair follicles themselves, bypassing the skin’s surface (the stratum corneum) to penetrate deeply, using a route known as ‘transfollicular penetration’.
What concentration is best?
Safe and effective concentrations tend to range between 0.1%-2%. The upper end of this scale is more medical grade, whereas the lower end is the concentration you’d usually find in cosmetic products.
Is there a difference between ‘GHK’ and ‘GHK-Cu’?
Yes, the ‘Cu’ bit makes a big difference to the efficacy. The copper-binded complex is the biologically active form, so if you’re buying a product that doesn’t specifically contain ‘GHK-Cu’ but instead lists something generic like ‘copper complex’ or ‘peptide complex’, it’s probably trying to pull the wool over your eyes.
How to apply
Apply a topical solution, containing 0.1-2% of the active ingredient, to a clean, dry scalp 1-2 times daily. Leave the product on the scalp for a while before washing off – it needs contact time with the scalp to be absorbed. Don’t layer vitamin C products, which can inactivate the copper. If you’re combining minoxidil, wait until the minoxidil has been fully absorbed before applying your copper peptide solution.
Takeaway
While the evidence so far for GHK-Cu shows promise as a potential hair loss treatment, it is not extensive enough to draw firm conclusions about how effective it is at slowing male pattern baldness and promoting regrowth, or how long results might last. It has also not undergone any trials to test its long-term safety. More high-quality clinical trials are needed before it can be recommended as an effective hair loss treatment.
All of our blog articles are reviewed by our Medical Director before publication.
