What is the recommended dosage for Copper Peptides (GHK-Cu)?

Topical: 1-3% GHK-Cu in topical formulations applied daily

What are the side effects of Copper Peptides (GHK-Cu)?

Potential side effects include: Scalp irritation or redness with topical use, Skin sensitivity in some individuals, Copper toxicity risk if ingested orally in large amounts.

What are copper peptides and how might they support hair?

Copper peptides (GHK-Cu) are small protein fragments that bind copper and are involved in wound healing, collagen synthesis, and tissue remodeling. Topical copper peptides may support hair follicle size and growth phase duration according to preliminary research. They are primarily used topically rather than orally. Clinical evidence is limited to small studies. Consult your healthcare provider.

How are copper peptides applied for best scalp results?

Copper peptides for hair and scalp are most commonly delivered topically as serums or leave-on treatments rather than oral supplements. The GHK-Cu tripeptide (glycine-histidine-lysine bound to copper) penetrates the stratum corneum and reaches dermal cells where it may stimulate follicle activity. Typical serum concentrations range from 0.5% to 2%; higher concentrations are not necessarily more effective and may cause irritation. Apply to a clean scalp and avoid rinsing for at least 4 hours to maximize absorption. Consistency over 3–6 months is generally needed to assess results.

What does research suggest about copper peptides and hair follicle size?

Preclinical studies indicate that GHK-Cu may increase follicle size and extend the anagen (active growth) phase by stimulating proteins involved in follicle development, including fibroblast growth factor (FGF-7) and vascular endothelial growth factor (VEGF). One small study found topical copper peptides produced measurable increases in hair follicle diameter over 6 months compared to baseline. While these findings are encouraging, large-scale randomized controlled trials are still needed to confirm efficacy in humans. Copper peptides are generally well-tolerated topically, with mild redness being the most commonly reported side effect.

Copper Peptides (GHK-Cu)

peptide

Also known as: GHK-Cu, Copper tripeptide-1, Glycyl-L-histidyl-L-lysine:copper(II)

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About

GHK-Cu is a naturally occurring copper-binding tripeptide that may support hair follicle health through wound healing and tissue remodeling pathways. In vitro studies suggest GHK-Cu can increase hair follicle size, stimulate proliferation of follicular cells, and extend the anagen growth phase. Clinical evidence is still emerging.

How It Works

GHK-Cu stimulates dermal papilla cells, upregulates growth factors (VEGF, FGF), promotes ECM remodeling, and enhances follicle blood supply.

Evidence For Conditions

Condition	Grade	Studies	Participants
Androgenetic Alopecia	D	0	--	View →
Age-Related Hair Thinning	D	0	--	View →

Side Effects

Scalp irritation or redness with topical use
Skin sensitivity in some individuals
Copper toxicity risk if ingested orally in large amounts

Drug & Supplement Interactions

Other topical actives (minoxidil — may affect absorption timing)
Zinc supplements (zinc and copper compete for absorption if taken orally)
Chelating agents (may bind copper and reduce efficacy)

Always inform your healthcare provider about all supplements you take.

Quick Facts

Dosage: Topical: 1-3% GHK-Cu in topical formulations applied daily
Forms: topical serum topical solution
Natural Sources: Naturally present in human plasma (decreases with age)
Upper Limit: Not established for topical use; oral supplementation not recommended
Best Time: Apply topically to clean scalp in the evening; allow 20 minutes before other products

Evidence Summary

Androgenetic Alopecia D

Age-Related Hair Thinning D

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.