Biotinoyl Tripeptide-1

Overview

Biotinoyl Tripeptide-1 is a three-amino-acid peptide chemically linked to biotin, a B-complex vitamin essential for keratin production. The biotin acts both as a carrier — helping the peptide move through the upper scalp — and as a co-active that supports keratin synthesis once it reaches the follicle. The combination is one of several “hair growth peptides” on the cosmetic market.

It is supplied as a clear to slightly yellow water-thin liquid, pre-diluted in water and butylene glycol, with a peptide content of around 100-500 ppm. The trade-name version sold to brands is one supplier’s branded blend, often combined with botanicals; the INCI for your label is biotinoyl tripeptide-1.

Shelf life is 12-18 months stored cool and dark. It is fully water-soluble and has no scent.

Published research is modest but positive — small trials show measurable improvements in hair shaft thickness, follicle anchorage, and shedding over 3-4 months of daily use in mild thinning. It is a cosmetic-grade option, not a prescription hair-growth substitute.

What it does in a formula

The peptide reaches the dermal papilla at the base of the hair follicle and is hypothesized to stimulate the papilla cells to support a stronger growth phase. The attached biotin contributes to keratin synthesis once inside follicle cells. Independent studies suggest improvements in the way each hair anchors into the follicle, reducing shedding from gentle traction (brushing, washing).

It is invisible in finished products — no scent, no color, no texture impact. It pairs well with caffeine, niacinamide, panthenol, and other hair-positioning peptides.

How to use

Cool-down only, below 40 C. Stir in gently once the formula has cooled. The peptide tolerates brief warming but degrades over time at heat-phase temperatures.

Usage rates by product type (referring to the supplier blend, not pure peptide):

• Leave-on scalp serums: 2-4%
• Leave-on hair tonics: 2-4%
• Leave-in conditioners: 1-2%
• Multi-active hair growth blends: 2-3%

Effective minimum is around 1.5% of the blend; standard use is 3%. Rinse-off shampoos are generally not the best vehicle — contact time is too short for a peptide active.

Best for / Worst for

Best for: mild thinning, postpartum shedding, age-related density loss, leave-on scalp serums, formulators stacking multiple hair actives.

Worst for: advanced pattern baldness (the peptide cannot revive dead follicles), rinse-off products, anyone expecting prescription-drug-level results.

Common pitfalls

Treating it as a hair-growth drug. It is a cosmetic ingredient with gentle effects on follicle support. For significant pattern hair loss, recommending a doctor consultation about prescription options is appropriate.

Using only in shampoo. Contact time is too short for the peptide to reach the dermal papilla. Leave-on is the right format.

Cooking it. Always cool-down. Heat-phase addition degrades the peptide over shelf life.

Inconsistent use. Realistic timeline for visible change is 3-6 months of daily application.

Substitutes

• Acetyl Tetrapeptide-3 — another scalp peptide for hair density.
• Caffeine — non-peptide scalp stimulant, much cheaper.
• Procapil — proprietary blend including biotinoyl tripeptide-1 plus apigenin and oleanolic acid.
• Redensyl — proprietary blend of botanical actives and a peptide for hair growth.