Peptide ChooserPeptides for hair loss, compared with the proven options.
Finasteride and minoxidil are the only treatments on this page the FDA has approved for hair loss, and generic finasteride starts at about $10 a month. Copper peptide serums are cosmetics: the evidence is from lab and follicle-culture studies, not from large trials in people. Injectable peptides sold for hair are not approved for any use, and we found no human evidence for hair.
Cheapest proven option, per month
$10 /mo from
Finasteride 1 mg (generic, prescription), with a pharmacy coupon; average cash price $45.80. Prices checked 30 Oct 2026.
Every option, side by side
3 options checked on the same five criteria. Rows that are not approved for human use carry no price and no seller.
| Option | FDA status for hair loss | Evidence in people | Price from | How you get it |
|---|---|---|---|---|
| Finasteride 1 mg and minoxidil 1, 2Prescription pill (men) and over-the-counter liquid or foam | FDA approved | Strong: many trials in people | $10/mogeneric finasteride with a pharmacy coupon; average cash price $45.80 | Prescription for finasteride; minoxidil over the counter |
| Copper peptide serums (GHK-Cu) 3, 4Sold as cosmetics for the scalp | Not approved for hair loss | Limited: lab and follicle-culture studies | $48/30 mLDivi Scalp Serum, one-time price | Over the counter, no prescription |
| Injectable peptides sold for hairResearch-labeled vials | Not approved | None found in people | We do not list prices or sellers for products that are not approved for human use | Not for human use |
Sources
- MedlinePlus, Finasteride, revised 15 Jun 2026: https://medlineplus.gov/druginfo/meds/a698016.html
- GoodRx, How much is finasteride without insurance, 3 Aug 2026: https://www.goodrx.com/finasteride/how-much-is-finasteride-without-insurance
- Pyo HK et al., The effect of tripeptide-copper complex on human hair growth in vitro, Archives of Pharmacal Research 30(7), 2007: https://agris.fao.org/search/fr/records/65de423b63b8185d9ca7d5b9
- Divi, Scalp Serum product page, price checked 30 Oct 2026: https://diviofficial.com/products/scalp-serum