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Peptide

Biotinyl Tripeptide-1 (Procapil)

Prescription drug or research compound. Use only under the care of a licensed prescriber. Information here is educational and not a recommendation to obtain or use it.

Biotinyl Tripeptide-1 (Procapil). Topical peptide complex marketed for hair anchoring.

How it works. Stimulates anagen markers and follicle anchoring proteins (laminin, integrin).

What the research supports. 1 graded claims. Strongest: Improves hair density in pilot trials (limited).

How much to take. Typical dose: 3% topical, daily.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with Collagen peptides, Vitamin C.

Common forms. Available as Subcutaneous injection, Oral or sublingual lozenge, Nasal spray, Compounded topical.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Biotinyl Tripeptide-1 (Procapil). Anecdotes are not medical advice.

Biotinyl Tripeptide-1 (Procapil). Topical peptide complex marketed for hair anchoring.

Molecular structureC10H16N2O3S · 244.31 g/mol

What it is

Topical peptide complex marketed for hair anchoring.

Food sources

Synthetic peptide manufactured to pharmaceutical or research-grade puritySubcutaneous injection, sublingual, or oral preparation depending on bioavailabilityCompounded by a licensed pharmacy for clinical use

Goals

Skin, Hair & Nails

How it works

Stimulates anagen markers and follicle anchoring proteins (laminin, integrin).

Pathways

  • Stimulates anagen markers
  • follicle anchoring proteins (laminin, integrin)

Effects

  • +hair density in pilot trials supports

What the research supports

Improves hair density in pilot trialslimited

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
3% topical, daily
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodEither with or without food.
Best formMost evidence is based on the subcutaneous injection form.

Side effects & interactions

Common side effects

  • Scalp irritation

Medication interactions

Prescription medications (general)minor

Always disclose Biotinyl Tripeptide-1 (Procapil) use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • Collagen peptidesProvides amino acid substrate for connective tissue synthesis.
  • Vitamin CRequired cofactor for collagen hydroxylation.

Common forms

  • Subcutaneous injection
  • Oral or sublingual lozenge
  • Nasal spray
  • Compounded topical

Key studies

8 studies cited in total.

PubMed: Biotinyl Tripeptide-1 (Procapil) — Improves hair density in pilot trials ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Biotinyl Tripeptide-1 (Procapil) and "Improves hair density in pilot trials". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Biotinyl Tripeptide-1 (Procapil) — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Biotinyl Tripeptide-1 (Procapil) and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Biotinyl Tripeptide-1 (Procapil) — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Biotinyl Tripeptide-1 (Procapil) and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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