Peptides for Lash Growth
Peptides for lash growth have one clear winner: GHK-Cu, the copper peptide. The peptides in cosmetic lash serums are different molecules doing a different job.
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Where to Buy Lash-Growth Peptides?
| Vendor | Format | Price | Per mg |
|---|---|---|---|
| Amino Club | GHK-Cu 50mg vial | $29.99 | $0.60 |
| EZ Peptides | GHK-Cu 50mg vial | $35.00 | $0.70 |
| Ascension Peptides | GHK-Cu 100mg pre-mixed, 3ml | $65.00 | $0.65 |
Three vendors that we follow sell research-grade GHK-Cu. Each vendor does its own independent testing of their products. Amino Club has the least expensive method of purchasing GHK-Cu in a 50mg vial for $29.99. EZ Peptides also offers the same size vial for $35.00. Ascension does not offer powder-based GHK-Cu but offers a pre-mixed 100mg solution in a 3ml vial for $65.00. Ascension is the only one of the three to offer a pre-mixed or ready-to-use version of GHK-Cu.
Do Peptides Grow Lashes?
Honest Answer: No injectable peptide has ever been tested on humans for lash length. The only thing that has ever been tested and found effective at increasing lash length through clinical trials is bimatoprost (prescription drug in Latisse), which is not a peptide. What GHK-Cu does have going for it is follicle evidence.
It has shown in hair studies that it will increase the size of small follicles and put them into the growth stage. A lash is simply a short cycle hair. This is the entire hypothesis behind GHK-CU potentially working for lashes as well.
When you see a peptide in a lash serum, it’s typically myristoyl pentapeptide-17 applied topically to condition the existing lashes so they appear thicker. One has follicle research and the other has cosmetic research.
Does GHK-Cu actually work for Lashes?
The compound is legit; the lash claim is unproven, and a careful buyer should hold both thoughts. GHK-Cu itself is among the best-studied peptides in the catalog, with decades of dermatology work behind it. The lash-serum boom pulls a lot of search traffic toward it, and traffic attracts sellers who skip testing. Match the certificate of analysis to the batch number on the vial, and treat any listing that promises longer lashes as a red flag rather than a selling point.
Primary Sources
- The effect of tripeptide-copper complex on human hair growth in vitro — Pyo et al., Archives of Pharmacal Research, 2007
- Targeting of CXXC5 by a competing peptide stimulates hair regrowth — Journal of Investigative Dermatology, 2017
- Minoxidil-dutasteride-copper peptide combination regrowth study, 2025
What Do Lash-Growth Peptides Cost?
Research-grade GHK-Cu runs about $0.60 to $0.70 per milligram: $29.99 for 50mg at the low end and $65.00 for Ascension’s pre-mixed 100mg format. That is a fraction of what branded lash serums charge for a few milliliters. Any peptide vendor mentioned on this page is strictly for non-human research use.
Ready to order GHK-Cu?
Research use only. Third-party tested, shipped in 3 to 5 business days.