Peptides
AHK-Cu
Also called Copper Tripeptide-2
AHK-Cu interests people who want thicker-looking hair or help with a thinning hairline without starting another hormone-targeting treatment. Its main research signal is encouraging growth in isolated hair follicles. That is a reason for interest, but it does not establish visible regrowth in people or make it a replacement for proven hair-loss treatment.
Dosage & duration
Named topical cosmetic example
Morren Follicle Fuel
Reported use · unapproved regimen- Dose
- 1.0% AHK-Cu serum; application amount is product-specific
- How often
- Daily topical use
- How long
- No trial-established regrowth course
Concentration declared by the manufacturer, not a clinical dose or a homemade formulation instruction.
Sources: 2
Do not convert a scalp-serum percentage into an injection dose. A cosmetic serum is not made for injection or application into punctured skin.
How it fits together
Make hair photos a fair comparison
AHK-Cu is sought for fuller-looking hair. The isolated-follicle study does not establish visible regrowth in people.
-
Keep the view consistent
Match the angle, lighting, hairstyle and wet-or-dry state.
-
Compare the same features
Look at the hairline, part width and visible scalp across those matching views.
-
Account for other changes
Other hair treatments or new products can affect what the photos show.
Why choose a copper peptide for hair?
Readers are usually looking for a fuller hairline or an option that feels different from hormone-directed treatment. The relevant AHK-Cu experiment studied follicles outside the body. It supports further research, but does not tell us how much hair a finished serum will regrow on a scalp.
Is AHK-Cu better than GHK-Cu?
The names are easy to confuse and products sometimes combine them. A study of one peptide does not prove the other works better, and a blend cannot show which ingredient explains an improvement. Look for the exact ingredient and concentration rather than a general “copper peptide” claim.
How long until results?
No verified human AHK-Cu trial establishes a response deadline. Claims about visible change by a certain week are seller expectations or individual reports. Consistent photographs are more useful than repeatedly changing several products and then crediting the newest one.
Topical does not mean risk-free
The whole formula matters, not just the peptide. Irritation or worsening scalp symptoms is a reason to stop and reassess. Sudden, patchy or unexplained hair loss deserves diagnosis; delaying effective treatment while testing a serum can lose useful time.
Model details: AHK-Cu · relative timing
Compare timing and buildup for this compound. The values are not blood concentrations or a measure of strength.
Shows a relative timing scenario; absolute blood concentrations are not calibrated.
Timing assumptions and sources
Legacy 0.96 h is an assumption; the 10^-12–10^-9M in-vitro range is an experiment concentration, not a PK endpoint.
One 1 mg input peaks at 1 relative unit after a single dose. Other amounts scale proportionally; overlapping doses add when accumulation is on. Different compounds use separate relative scales.
- Timing half-life used
- 0.96 hours
- Absorption half-life assumed
- 0.24 hours
- Reference amount for the relative scale
- 1 mg
- Absorption half-life is assumed to be one quarter of the slower timescale (0.24 h); it is not a measured absorption parameter.
- A single 1-unit input has a peak of 1 relative unit; scaling and repeated-dose addition are mathematical assumptions. This normalization is independent of the example dose.
- Do not borrow GHK-Cu or freeGHK pharmacokinetics.
- No administered-human route-matched absolute calibration established.
- The effect of tripeptide-copper complex on human hair growth in vitro.
Legacy 0.96 h is an assumption; the 10^-12–10^-9M in-vitro range is an experiment concentration, not a PK endpoint.
ahk-cu-relative-timing-2026-10 · version 1
Common questions
Can AHK-Cu replace minoxidil?
The reviewed AHK-Cu work does not establish equivalent hair-loss results. A product testimonial is not a direct comparison.
Is injectable AHK-Cu better for hair?
No verified human comparison establishes that. The isolated-follicle study cannot determine a systemic injection dose or benefit.
Sources Labels, studies and notes behind this guide
Catalog evidence: Animal or laboratory research. This describes the type of evidence, not a clinical review of every claim.
Summary and fact source checks: 2026-10-07. This records source checking, not medical review of the whole page.
Notes on the quick facts
- Main goal
- Regrowth, reduced shedding and thicker appearance are separate outcomes.
- Common format
- A serum concentration is not an injected milligram dose.
- AHK vs GHK
- Evidence and product claims should stay attached to the actual ingredient.
- 1. Pyo et al.: AHK-Cu hair-follicle experiment
Original abstract inspected: isolated human follicles and cultured dermal papilla cells; no patient hair-loss trial.
- 2. Morren Follicle Fuel product information
Manufacturer search text specifies 1.0% AHK-Cu topical serum and daily use. Product formulation example only; efficacy not endorsed.
- 3. The effect of tripeptide-copper complex on human hair growth in vitro.
Legacy 0.96 h is an assumption; the 10^-12–10^-9M in-vitro range is an experiment concentration, not a PK endpoint.
- 4. GHK-Cu post-laser randomized trial
Identity/evidence comparator: different Gly-His-Lys copper peptide and skin endpoint; cannot validate AHK hair outcomes.
Related compounds and examples
Related compounds
GHK-Cu (Copper Peptide)
GHK-Cu for skin and hair: realistic cosmetic goals, topical versus injection evidence, and separately sourced amounts, frequency and duration.
KPV
KPV for gut and skin concerns: oral versus injected products, reported dose context and realistic expectations for inflammation claims.
Glutathione
Glutathione for skin and antioxidant goals: oral study doses, injection trade-offs and why a higher blood level is not a guaranteed detox or cosmetic result.