Encyclopedia · protein or peptide
Procapil
Procapil is a branded trio of a biotin-linked peptide, apigenin and oleanolic acid sold as a hair-anchoring active, with small studies that are mostly add-ons to other treatments.
What it is
Procapil is a cosmetic raw-material blend of a biotinylated peptide (see biotinoyl tripeptide-1), apigenin and oleanolic acid. It is a cosmetic in the US, EU and UK.
How it works
The anchoring, anti-androgen and microcirculation effects are claimed by the supplier. No independent primary mechanism study was found.
What the studies show
- In 160 people, PRP plus daily 5% Procapil scored better than PRP alone over 6 months on dermatologist and patient scales (P<0.05). The study was not randomized or placebo-controlled and the scores were subjective. Khoso 2024
- In 54 men, Procapil plus PRP did worse than Redensyl plus saw palmetto, biotin and PRP on pattern hair loss grade. Tr 2023
- A multicenter observational study of 60 people found a serum used as an add-on to minoxidil reduced shedding (P=0.022) and improved the hair-pull test. Two authors work for the maker and Procapil's own contribution is unclear. Dhurat 2025
- A 2025 review found studies of such actives are combined formulas, small and conflicted. Bikash 2025
How it's used in studies
3% to 5% solutions applied once or twice daily over 3 to 6 months, usually together with PRP or minoxidil.
Side effects and safety
No adverse events were reported in the studies above.
Bottom line
No trial isolates Procapil against placebo. It may be a harmless add-on, but do not expect minoxidil-level results. A placebo-controlled single-ingredient trial would be needed to say which of the three components, if any, matters. See cosmetic hair growth serums.
Studies 4
Khoso H, Fahim M. Platelet-rich plasma alone versus platelet-rich plasma with daily topical 5% Procapil in androgenetic alopecia. J Ayub Med Coll Abbottabad. 2024
Tested: PRP alone vs PRP plus 5% Procapil, not randomized or placebo-controlled
Result: The add-on group scored better on dermatologist and patient scales (P<0.05); scores were subjective.
Read the study ↗Tr P et al. A comparative study of topical Procapil with PRP versus topical Redensyl, saw palmetto, and biotin with PRP in androgenetic alopecia. Cureus. 2023
Tested: Procapil plus PRP vs Redensyl, saw palmetto and biotin plus PRP
Result: The Redensyl combination did better on androgenetic alopecia grade (P<0.05); neither was compared with PRP alone.
Read the study ↗Dhurat R et al. Real-world efficacy and safety of Cuticapil Stem Hair Serum as an add-on to minoxidil in androgenetic alopecia. J Cosmet Dermatol. 2025
Tested: serum add-on to minoxidil, multicenter observational
Result: Shedding and hair-pull test improved (P=0.022 for shedding); two authors work for the maker and Procapil's own contribution is unclear.
Read the study ↗Bikash C. Topical alternatives for hair loss: beyond the conventional. Int J Trichology. 2025
Tested: Redensyl, Capixyl, Procapil, Baicapil, AnaGain and similar actives
Result: Evidence is mostly small studies of combined formulas, often conflicted and rarely compared with standard therapy.
Read the study ↗Related
- Biotinoyl tripeptide-1Biotinoyl tripeptide-1 is biotin attached to the GHK peptide; the only hair-growth data are manufacturer claims.
- RedensylRedensyl is a branded cosmetic blend marketed to wake follicle stem cells, with one small vehicle-controlled trial in a blend and several maker-linked open-label studies.
- CapixylCapixyl is a branded blend of a peptide and a red clover isoflavone; one tiny trial of a similar blend matched 3% minoxidil, with no placebo arm.
- GHK-Cu (copper tripeptide-1)GHK-Cu is a copper-binding peptide with a long skin-repair record but no published controlled trial for hair growth.
- Caffeine (topical)Caffeine in shampoos and leave-on liquids clearly stimulates hair follicles in the lab, but the human trials are small, mostly industry-run and mostly on blends.