GHK-Cu
GHK-Cu is a naturally occurring tripeptide composed of glycine, histidine, and lysine, which binds to copper ions. It is found naturally in the human body and is released after injury. GHK-Cu was originally discovered in 1973 where it was thought to play a part on tissue repair and regeneration. It is commonly added into dermatologic and hair care formulations due to its reported effects on skin healing, collagen synthesis, and hair follicle health.
Role in Therapy
The skin’s natural capacity for repair and resilience is the strongest in younger individuals, due to efficient cellular maintenance and protective mechanisms. With aging, these repair systems stop working with the same efficiency as before. One factor associated with this decline is a decrease in levels of GHK (Glycyl-L-Histidyl-L-Lysine). In healthy young adults (around age 20), plasma concentrations of GHK average approximately 200 ng/mL (10⁻⁷ M). By age 60, levels typically decrease to around 80 ng/mL, reflecting an age-related decline that may contribute to diminished tissue regeneration.
These findings suggested a systemic role for GHK in promoting cellular regeneration. Once released, GHK has been shown to: stimulate collagen production, enhance synthesis of glycosaminogylcans and decorin, a small proteo glycan involved in matrix organization, and modulate the activity of metalloproteinases (MMPs) and their inhibitors, influencing extracellular matrix remodeling.
By balancing protein degradation and repair, GHK helps prevent both excessive matrix breakdown and the accumulation of damaged structural proteins. These regulatory effects may contribute to improved skin integrity, texture, and appearance over time.
Did you know?
Ascorbic acid is a strong reducing agent that can alter the oxidation state of copper ions in GHK-Cu, potentially disrupting its biological activity and reducing its regenerative effects. To maximize efficacy, it is advisable to apply these agents at different times of day. e.g., vitamin C in the morning and GHK-Cu in the evening.
What does the research say?
Several clinical trials have supported the use of GHK-Cu in improving visible signs of skin aging:
- A 12-week study on 71 women with varying degrees of photoaged skin showed that a GHK-Cu face cream helped increase skin thickness and firmness, reduced sagging, improved tone and clarity, and softened both fine lines and deeper wrinkles.
- In another study, 41 women used a GHK-Cu eye cream for 12 weeks. Results showed better outcomes than both placebo and vitamin K cream, with noticeable improvements in wrinkles, skin density, and overall eye area appearance.
- When applied to thigh skin over 12 weeks, GHK-Cu led to a collagen boost in 70% of participants, outperforming both vitamin C (50%) and retinoic acid (40%).
- Twice-daily application of GHK-Cu cream for 12 weeks also helped reduce uneven pigmentation, firmed loose skin, improved texture, and promoted keratinocyte activity—suggesting benefits at both structural and cellular levels .
- A pilot study by Krüger and colleagues confirmed that GHK-Cu use increased both dermal and epidermal thickness, improved hydration and elasticity, and enhanced collagen I production, leading to smoother, more youthful-looking skin.
Exploring new ways to use GHK-Cu? Discover our unique troche formulations; ask us for more information!
GHK-Cu's Potential Role in Hair Loss
GHK-Cu is a naturally occurring copper-binding peptide that is thought to support hair growth by:
- Enhancing VEGF production to improve blood flow and nutrient delivery to hair follicles
- Blocking TGF-β, a factor involved in early hair follicle regression
- Stimulating dermal papilla cell growth while preventing cell death
Together, these mechanisms may promote healthier, longer-lasting hair growth cycles (Zhou et al., 2018)
References
Pickart, L., & Margolina, A. (2018). Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data. International journal of molecular sciences, 19(7), 1987. https://doi.org/10.3390/ijms19071987
Zhou, L., Wang, H., Jing, J., Yu, L., Wu, X., & Liu, M. (2018). Copper peptide (GHK-Cu) stimulates hair growth via promoting angiogenesis and inhibiting TGF-β signaling. International Journal of Molecular Sciences, 19(4), 1095. https://doi.org/10.3390/ijms19041095
