Hero productPeptide Lash Serum
Copper peptide technology for visibly longer, denser-looking lashes
Peptide formulation
Peptide Technology
Powered by Copper Tripeptide-1 (GHK-Cu) - our hero copper peptide for a denser, longer-looking lash line - with Myristoyl Pentapeptide-17, Myristoyl Hexapeptide-16 and Biotinoyl Tripeptide-1 to push visible length and fullness. Built without prostaglandin analogues (the class linked to iris pigmentation and eye-area changes). Panel on file; available on request.
Key actives
Copper Tripeptide-1
Copper Tripeptide-1 · Myristoyl Pentapeptide-17 · Myristoyl Hexapeptide-16 · Biotinoyl Tripeptide-1 · Sodium Hyaluronate
- Free from Prostaglandins
- Free from Parabens
- Free from Fragrance
- Free from Sulphates
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Enquire about availabilityWho it's for
Anyone who wants the strongest prostaglandin-free peptide serum for visibly longer, fuller, denser-looking lashes - copper peptide hero, daily use.
How to use
Apply nightly to a clean, dry upper lash line. Use consistently for best visible results.
Full ingredient disclosure (INCI)
INCI means International Nomenclature of Cosmetic Ingredients: the standard names used on cosmetic labels worldwide.
Aqua (Water), Glycerin, Panthenol, Propanediol, Copper Tripeptide-1, Myristoyl Pentapeptide-17, Myristoyl Hexapeptide-16, Biotinoyl Tripeptide-1, Sodium Hyaluronate, Biotin, Pantothenic Acid, Arginine, Allantoin, Hydroxyethylcellulose, Sodium Citrate, Citric Acid, Phenoxyethanol, Ethylhexylglycerin
Test data on file
- Prostaglandin analogues
- None in disclosed INCI
- Finished-product panel
- On file; available on request
- Extensions & lifts
- Water-based, oil-free formula
Independent lab results stand behind every product, and we'll send any report on request, reference RL-LGS-001.
Built to the Ruski Standard
Copper Tripeptide-1 (GHK-Cu), held to the Ruski Standard
This serum’s hero active is Copper Tripeptide-1 (GHK-Cu) - the copper-binding tripeptide we put on the box and bottle for a denser, longer-looking lash line. We keep Myristoyl Pentapeptide-17 (SymPeptide XLash-class), Myristoyl Hexapeptide-16 and Biotinoyl Tripeptide-1 (Widelash / Procapil-class) as supporting length and conditioning peptides, with humectants in a water-based, oil-free base suitable around extensions and lifts. No prostaglandin analogues. Finished-product panel on file for visible results; ingredient literature mixes manufacturer data and cosmetic-science consensus. Apply nightly to a clean upper lash line.
Read Ruski Standard
The formulation
Every ingredient earns its place. Here is each one: what it is, why it's in this formula, and what evidence supports it, including where that evidence is limited.
Water · INCI: Aqua (Water)carrier/solvent
The water base that dissolves the humectants, peptides and buffering salts and carries them across the lash line in a light, fast-drying serum.
Established cosmetic-science consensus: water is the standard solvent base for aqueous serums.
Glycerinhumectant
Draws and holds moisture at the lash line to keep the fibre supple and conditioned so it looks smoother and less brittle.
Well-established cosmetic-science consensus with decades of peer-reviewed hydration data; lash-specific published evidence is limited.
Provitamin B5 · INCI: Panthenolconditioning agent
Pro-vitamin B5 that binds water and conditions the lash fibre for a smoother, more flexible surface across nightly use.
Cosmetic-science consensus supported by peer-reviewed hair-conditioning data; direct lash evidence is limited.
Propanediol (plant-derived diol) · INCI: Propanediolcarrier/solvent
A plant-derived solvent and secondary humectant that helps dissolve the peptides and improves the serum's slip and moisturisation.
Cosmetic-science consensus plus supplier data on its solubilising and humectant function.
GHK-Cu (copper peptide) · INCI: Copper Tripeptide-1active
Hero copper-binding tripeptide (Gly-His-Lys complexed with copper) for a denser, longer-looking lash line and healthier-looking follicle environment - the lead story peptide on this serum.
Peer-reviewed literature supports GHK-Cu in skin repair and hair-follicle signalling contexts; dedicated eyelash RCTs are limited. Finished-product appearance outcomes sit in the RUSKI panel on file.
Myristoyl Pentapeptide-17active
Supporting length-appearance peptide (SymPeptide XLash-class) kept in the complex for visibly longer, fuller-looking lashes without prostaglandin action.
Manufacturer consumer-panel data for Myristoyl Pentapeptide-17 (SymPeptide XLash-class) reports the appearance of longer, denser lashes; independent peer-reviewed evidence specific to lashes is limited.
Myristoyl Hexapeptide-16active
Companion conditioning peptide paired with Pentapeptide-17 to support the appearance of a denser lash line.
Supplier data supports its conditioning function; it is typically supplied alongside Pentapeptide-17 and independent peer-reviewed lash evidence is limited.
Biotin-linked tripeptide · INCI: Biotinoyl Tripeptide-1active
Biotin-linked peptide (Widelash / Procapil-class) that conditions the lash line and ties biotin into the peptide complex for fuller-looking results.
Manufacturer/supplier data supports Biotinoyl Tripeptide-1 in hair-conditioning complexes (Croda Widelash; also used in Procapil); published evidence is largely scalp-hair / manufacturer panel based, with limited independent lash-specific data.
Sodium hyaluronate (salt of hyaluronic acid) · INCI: Sodium Hyaluronatehumectant
The salt form of hyaluronic acid that holds water at the lash line for immediate suppleness and a conditioned look.
Strong cosmetic-science consensus with peer-reviewed hydration data; lash-specific evidence is limited.
Biotin (vitamin B7) · INCI: Biotinconditioning agent
Vitamin B7 included to condition the lash line as part of the vitamin and peptide complex.
Topical conditioning use rests on cosmetic-science consensus rather than robust peer-reviewed topical-lash trials; evidence for oral biotin does not transfer to topical lash function.
Vitamin B5 · INCI: Pantothenic Acidconditioning agent
Vitamin B5 that works with panthenol to bind moisture and condition the lash fibre.
Cosmetic-science consensus on B5 conditioning; direct lash studies are limited.
Arginine (amino acid) · INCI: Arginineconditioning agent
An amino acid that conditions the lash fibre and contributes to buffering the formula toward a comfortable pH.
Cosmetic-science consensus on amino-acid conditioning and buffering; lash-specific peer-reviewed data is limited.
Allantoinconditioning agent
A soothing conditioning agent that keeps the serum comfortable on the delicate skin and lash line during nightly use.
Cosmetic-science consensus as a soothing agent, supported by some peer-reviewed skin-soothing data.
Hydroxyethylcellulose (cellulose thickener) · INCI: Hydroxyethylcellulosethickener
A cellulose thickener that gives the serum an even, controlled texture so it stays on the lash line rather than running into the eye.
Cosmetic-science consensus as a standard rheology modifier.
Sodium citrate · INCI: Sodium CitratepH adjuster
Works with citric acid as a buffer to hold a stable, eye-comfortable pH throughout the product's life.
Cosmetic-science consensus as a buffering salt.
Citric acid · INCI: Citric AcidpH adjuster
Fine-tunes the pH so the serum sits in a skin- and eye-compatible range where the preservative system performs.
Cosmetic-science consensus as a standard pH adjuster.
Phenoxyethanolpreservative
The primary preservative protecting this water-based eye-area serum from microbial contamination through its shelf life and daily use.
Cosmetic-science consensus and regulatory safety review support its use as a broad-spectrum preservative in eye-area products.
Ethylhexylglycerinpreservative
A preservative booster that supports phenoxyethanol for broad-spectrum protection while adding mild conditioning slip.
Cosmetic-science consensus as a preservation booster and secondary conditioning agent.
Sources and limitations
Manufacturer or supplier data
MModerateA finished-product efficacy panel over 6 to 8 weeks of nightly use recorded a visible difference in the appearance of lash length and fullness.
RUSKI Lashes finished-product efficacy panel, lab ref RL-LGS-001 (on file, available on request)
Published study
EEmergingCopper Tripeptide-1 (GHK-Cu) is supported by peer-reviewed literature in skin repair and hair-follicle signalling; dedicated eyelash RCTs are limited.
Peer-reviewed literature on GHK-Cu (copper peptide) in skin and hair biology; cosmetic INCI Copper Tripeptide-1
Manufacturer or supplier data
EEmergingManufacturer consumer-panel data for Myristoyl Pentapeptide-17 reports the appearance of longer, denser lashes.
SymPeptide XLash (Myristoyl Pentapeptide-17) supplier/manufacturer technical and consumer-panel data
Manufacturer or supplier data
EEmergingBiotinoyl Tripeptide-1 (Croda Widelash; also used in Procapil-class complexes) is supported by manufacturer data for hair/lash conditioning appearance; independent peer-reviewed lash evidence is limited.
Croda Widelash (Biotinoyl Tripeptide-1) and Sederma Procapil manufacturer/supplier technical data
Cosmetic-science consensus
SStrongGlycerin, sodium hyaluronate, panthenol and propanediol are established humectants and conditioning agents with well-documented moisture-binding function.
Cosmetic-science consensus / standard cosmetic ingredient literature
Cosmetic-science consensus
SStrongPhenoxyethanol combined with ethylhexylglycerin is a widely used broad-spectrum preservative system reviewed as safe for use in eye-area cosmetics.
Cosmetic Ingredient Review and cosmetic-science consensus on phenoxyethanol preservation
Published study
SStrongProstaglandin analogue eyelash products are associated with side effects including iris hyperpigmentation and prostaglandin-associated periorbitopathy (orbital fat atrophy).
Peer-reviewed ophthalmology literature on prostaglandin analogues such as bimatoprost
Which serum
Three serums. Three jobs.
Peptide + Density is an AM/PM or alternate protocol - not “buy both for the same claim.” Recovery is overnight barrier and fibre repair, not a length story.
Named protocols (education, not checkout bundles yet): Length Protocol (Peptide + Recovery) · Density Protocol (Density + Foam) · Full Standard (all three).
Questions, answered
Can I use the Peptide Lash Serum with lash extensions and lifts?
Yes. The Peptide Lash Serum is water-based and oil-free, so it is formulated without oils that can weaken extension adhesive. Apply it to a clean, dry upper lash line and let it dry fully before contact; ask your technician to review the INCI for their specific system.
Why does a prostaglandin-free lash serum matter?
It matters because prostaglandin analogues are associated in ophthalmology literature with effects including iris pigmentation and changes around the eye. The disclosed formula contains no prostaglandin analogues and relies on Copper Tripeptide-1 (GHK-Cu) plus supporting peptides instead. Individual reactions to any cosmetic can still occur.
When can I expect to see a difference?
In the finished-product panel on file, a visible difference in the appearance of lash length and fullness was recorded over 6 to 8 weeks of nightly use. Results vary between individuals. The panel is available on request so you can assess the evidence and its limitations.
Can I use it if I have sensitive eyes?
The disclosed formula is free from fragrance, parabens and sulfates, but no cosmetic can be assumed suitable for every sensitive eye. Apply only to the upper lash line, avoid the waterline, patch test first, and discontinue use if irritation occurs.
How does the serum fit into my routine, and can I layer it?
Apply it once nightly to a clean, dry upper lash line as the last step of your evening routine, before eye cream. Because it is water-based and oil-free it layers cleanly under other products and alongside extensions or a lift.
What do the peptides actually do?
Copper Tripeptide-1 (GHK-Cu) is the hero for a denser, longer-looking lash line; Myristoyl Pentapeptide-17, Myristoyl Hexapeptide-16 and Biotinoyl Tripeptide-1 support visibly longer, fuller-looking results. These are cosmetic conditioning actives, not medicines - we describe openly what they can and cannot do in our published evidence.
Can I use Peptide Lash Serum and Bioactive Density together?
Yes - as a protocol, not as two products chasing the same claim. Peptide Lash is copper-peptide technology for visibly longer, denser-looking lashes; Bioactive Density is Bioactive Follicle Support for a denser-looking, better-anchored line. Use one in the evening and the other in the morning, or alternate nights. Do not expect both to deliver the same fuller-lashes outcome.