Biotinyl-GHK is a small peptide you will most often meet on the ingredient list of hair, lash and brow serums, written under its INCI name biotinoyl tripeptide-1. As the name suggests, it takes the well-known GHK peptide backbone — the same glycine–histidine–lysine tripeptide at the heart of GHK-Cu — and attaches a molecule of biotin (vitamin B7). The result is a peptide designed to be more lipophilic (oil-friendly) than plain GHK, so it can be carried into the sorts of leave-on scalp and lash formulas where it is used.
What is Biotinyl-GHK?
Chemically, Biotinyl-GHK is biotin covalently linked to the GHK tripeptide. If you have read our GHK-Cu and copper peptides pages, the GHK part will be familiar: it is a naturally occurring fragment that acts as a signalling peptide in the skin. Biotinyl-GHK is a cosmetic derivative of that same backbone, tuned for hair-care use rather than for the copper-carrying role that defines GHK-Cu. The two are relatives, not the same molecule — GHK-Cu holds a copper ion; Biotinyl-GHK holds a biotin group and no copper.
Its main claim to fame is as a headline component of Procapil, a branded cosmetic hair-care complex that pairs biotinyl-GHK with two plant-derived molecules, apigenin and oleanolic acid. When you see “Procapil” on a scalp or brow serum, biotinyl-GHK is the peptide doing the marketing heavy-lifting.
What is Biotinyl-GHK used for?
In cosmetic products it is positioned around the appearance of fuller hair, lashes and brows and a healthier-looking scalp. You will find it in:
- Scalp and hair serums — marketed for the look of hair density and reduced shedding appearance.
- Lash and brow serums — a common peptide alongside panthenol and conditioning agents.
- Leave-on tonics — often blended with caffeine, panthenol or other “scalp-support” ingredients.
The honest cosmetic framing is that these products aim to improve how hair, lashes and the scalp look and feel with consistent use. Biotinyl-GHK is a cosmetic ingredient, not a treatment for hair loss or any medical condition — anything in that territory is a matter for a clinician, not a serum.
Does Biotinyl-GHK work? What the evidence shows
This is where expectations need calibrating. The supporting data for biotinyl-GHK and the Procapil complex is largely in-vitro and manufacturer-sponsored, rather than a body of large, independent clinical trials. That is common for cosmetic peptides, and it is exactly why we rate the evidence level as limited.
What that means in practice:
- There is a plausible rationale built on the GHK backbone's signalling behaviour, plus supplier studies on the Procapil blend.
- There is not strong independent proof that a topical biotinyl-GHK serum regrows hair, and no serious cosmetic source should claim it does.
For the closely-related question of copper peptides and hair specifically, we dig into the literature in GHK-Cu for hair: what the research says — a useful reality check, since biotinyl-GHK rides on the same GHK story.
How is Biotinyl-GHK used in products?
Because it is oil-friendlier than plain GHK, biotinyl-GHK slots easily into leave-on scalp tonics, lightweight serums and lash formulas. A few practical notes:
- It is a leave-on ingredient — rinse-off shampoos give it little contact time, so serums and tonics are the usual format.
- It is typically one peptide within a blend (most famously Procapil), not a stand-alone hero at high percentages.
- Like most peptides, it rewards consistency over months, not days — hair and lash cycles are slow.
- It is generally well tolerated, but scalp and eye-area products deserve a patch test first, and lash serums should be kept out of the eyes.
It pairs naturally with the rest of the Procapil blend (apigenin, oleanolic acid) and with common scalp-serum companions such as caffeine and panthenol. Conceptually it also sits alongside the broader copper peptides family as another GHK-derived cosmetic ingredient.
Who is Biotinyl-GHK for?
It suits people who want a gentle, cosmetic addition to a hair, lash or brow routine and who have realistic expectations about what a topical peptide can do. If your concern is genuine hair loss, that is a medical question best raised with a professional — biotinyl-GHK is about supporting the appearance of hair, not treating a condition.
References
Background on the GHK peptide backbone: Pickart & Margolina, Int. J. Mol. Sci. 2018. Manufacturer data on the Procapil complex is supplier-published and should be read as such.