Peptide Schedule
AHK-Cu3 residuesAHKEach bubble = one amino acid. Size = residue mass. Color = chemical class.AHK-Cu
Benefits
About AHK-Cu
AHK-Cu (Copper Tripeptide-3) is a synthetic copper-binding peptide composed of alanine, histidine, and lysine chelated to a copper ion (Cu2+). It shares structural similarities with GHK-Cu but replaces the first-position glycine with alanine, which changes its three-dimensional conformation and receptor interactions. Research suggests AHK-Cu is particularly effective at stimulating dermal papilla cells and extending the anagen (active growth) phase of hair follicles. A 2007 study in the Archives of Dermatological Research demonstrated that AHK-Cu at concentrations as low as 10^-12 molar could stimulate hair follicle elongation and increase VEGF expression in human dermal papilla cells in vitro. Beyond hair, AHK-Cu activates fibroblast proliferation and promotes collagen and elastin synthesis, supporting firmer and smoother skin over time. The peptide modulates the Bcl-2/Bax ratio in dermal cells, providing anti-apoptotic protection that helps maintain cell viability during aging and stress. It also reduces levels of cleaved caspase-3 and PARP, two execution enzymes in the programmed cell death cascade. While GHK-Cu remains the more extensively studied copper peptide with broad gene-modulating effects, AHK-Cu offers a more targeted profile with particular strength in hair follicle biology and localized skin repair. Both injectable and topical formulations exist, though topical delivery at 0.5-1% concentration is the most common research application. AHK-Cu is considered a research compound with limited human clinical data, and users should approach it with appropriate caution.
Who Should Consider AHK-Cu
- Men and women experiencing hair thinning or pattern hair loss
- Adults seeking to improve skin firmness, texture, and elasticity
- Individuals interested in copper peptide therapy as an alternative or complement to GHK-Cu
- Researchers studying follicle biology and dermal papilla cell signaling
- Adults over 35 looking for targeted anti-aging support for hair and skin
How AHK-Cu Works
AHK-Cu chelates a copper ion (Cu2+) and delivers it to target cells where copper acts as a cofactor for enzymes involved in collagen cross-linking (lysyl oxidase), antioxidant defense (superoxide dismutase), and melanin production (tyrosinase). The peptide stimulates VEGF expression in dermal papilla cells, promoting angiogenesis and nutrient delivery to hair follicles. It modulates the Bcl-2/Bax ratio to shift cells away from apoptosis, and reduces cleaved caspase-3 and PARP levels. In fibroblasts, AHK-Cu upregulates collagen I and III deposition and increases extracellular matrix protein turnover, contributing to improved skin structure and wound closure.
What to Expect
Cellular signaling begins. No visible changes expected. Some users may notice temporary increased shedding as dormant follicles re-enter the growth cycle.
Early improvements in skin hydration and texture. Fine vellus hairs may appear at thinning areas.
Noticeable improvements in skin firmness. Hair shedding normalizes. New hair growth becomes more visible.
Peak results for hair regrowth protocols. Meaningful increase in hair density and thickness. Skin shows reduced fine lines.
Dosing Protocol
| Level | Dose / Injection | Frequency |
|---|---|---|
| Beginner | 100mcg | Daily |
| Moderate | 250mcg | Daily |
| Aggressive | 500mcg | Daily |
Note: Synthetic copper tripeptide (Ala-His-Lys-Cu). Primarily studied for hair follicle stimulation and skin rejuvenation. Available as injectable or topical. Closely related to GHK-Cu but with a different amino acid at position 1. Topical concentrations typically 0.5-1%.
How to Inject AHK-Cu
Injectable: reconstitute lyophilized powder with bacteriostatic water and inject subcutaneously near the target area (scalp for hair growth, face for skin rejuvenation) or abdomen for systemic effects. Topical: apply a 0.5-1% AHK-Cu serum to clean, dry skin or scalp once or twice daily. Massage gently and allow 15-30 minutes to absorb before applying other products.
Cycling Protocol
For injectable use, cycle 8-12 weeks on with a 4-week break. Topical formulations (0.5-1%) can be applied continuously without cycling. Hair growth protocols may require 12-24 weeks for meaningful results.
Pharmacokinetics
Source: Estimated from structural analogy to GHK-Cu; no direct pharmacokinetic studies published for AHK-Cu.
Loading the interactive decay curve.
Side Effects
Generally well-tolerated at standard concentrations. Possible mild redness or irritation at the application or injection site. Rare cases of temporary increased hair shedding during the first 4-6 weeks (follicle cycling acceleration). Discontinue if signs of copper sensitivity appear such as metallic taste or persistent skin discoloration.
Contraindications
- Pregnancy or breastfeeding (insufficient safety data)
- Wilson's disease or other copper metabolism disorders
- Known hypersensitivity to copper compounds or any component of the peptide
- Menkes disease or copper transport deficiency
- Active skin infection at the application site
- Concurrent high-dose oral copper supplementation (risk of copper overload)
Drug Interactions
- Copper-chelating agents (penicillamine, trientine) — may bind copper and neutralize the peptide complex
- High-dose zinc supplements (>50mg/day) — competitive inhibition at copper transport sites reduces cellular uptake
- Topical vitamin C (ascorbic acid at low pH) — destabilizes the copper-peptide bond; separate application by 2+ hours
- AHA/BHA chemical exfoliants — acidic pH environment can degrade the peptide; do not apply simultaneously
- Minoxidil — compatible and potentially synergistic, but apply at different times to avoid dilution
