The Beauty & Personal Care Brand Builder Series

The Beauty & Personal Care Brand Builder Series

Multi-Peptide Serum for Hair Density | Manufacturing and Formulation Insights

This page provides an ingredient-level review of Multi-Peptide Serum for Hair Density by The Ordinary. Below you’ll find the publicly available ingredient list, a dynamic ingredient breakdown linked to the FormuNova ingredient database, and a formula structure overview intended for cosmetic founders, product developers, and brand teams researching competitor product architecture in modern hair growth and related Beauty & Personal Care categories. This page is a formulation and manufacturing review and does not imply or state any association between FormuNova and The Ordinary.

Full Ingredient List

Aqua (Water), Propanediol, Butylene Glycol, Glycerin, Caffeine, Biotinoyl Tripeptide-1, Acetyl Tetrapeptide-3, Larix Europaea Wood Extract, Pisum Sativum Extract, Scutellaria Baicalensis Root Extract, Triticum Vulgare Germ Extract, Glycine Soja Germ Extract, Trifolium Pratense Flower Extract, Camellia Sinensis Leaf Extract, Apigenin, Oleanolic Acid, Arginine, Glycine, Calcium Gluconate, Zinc Chloride, Lactic Acid, Gluconolactone, Dextran, Maltodextrin, Hydroxyethylcellulose, Xanthan Gum, Pentylene Glycol, Dimethyl Isosorbide, Polysorbate 20, Ppg-26-Buteth-26, Peg-40 Hydrogenated Castor Oil, Trisodium Ethylenediamine Disuccinate, Sodium Metabisulfite, Sodium Benzoate, Phenoxyethanol, Chlorphenesin

Formulation Deep Dive

The Ordinary Multi-Peptide Serum for Hair Density is engineered as a high-performance, water-based aqueous treatment designed to enhance hair thickness and scalp vitality. The delivery system utilizes a high concentration of propanediol and butylene glycol as solvents and penetration enhancers, complemented by dimethyl isosorbide to optimize the bioavailability of the complex peptide blend. The formulation features a sophisticated active matrix centered around Redensyl, which combines Larix Europaea Wood Extract and Camellia Sinensis (Green Tea) Leaf Extract to stimulate follicle stem cells, and Procapil, utilizing Biotinoyl Tripeptide-1 and Oleanolic Acid to improve anchoring and scalp microcirculation. Additionally, Acetyl Tetrapeptide-3 and Trifolium Pratense (Clover) Flower Extract (Capixyl) work synergistically to reduce hair shedding and improve density. The system is stabilized with a combination of hydroxyethylcellulose and xanthan gum for a lightweight, non-greasy texture, and is preserved using a robust blend of phenoxyethanol, chlorphenesin, and sodium benzoate to ensure microbiological stability.

Ingredient Analysis

About our ratings
Water GREAT
Purified water serves as the primary, high-quality solvent in most cosmetics.
Solvent
Propanediol GREAT
Improve hydration, solubilize actives, enhance texture and absorption, support barrier function.
Hydrator Emollient Barrier Support Solvent
Butylene Glycol GOOD
To hydrate and condition skin and hair, enhance the absorption of active ingredients, and improve product texture and stability.
Hydrator Moisturizer Emollient Texture Enhancer Conditioner Solvent Preservative
Glycerin GREAT
To attract and retain moisture in the skin and hair, enhancing hydration and improving barrier function.
Hydrator Moisturizer Emollient Texture Enhancer Conditioner Soother Barrier Support Anti-Aging Agent Solvent
Caffeine GOOD
To reduce puffiness and dark circles, improve skin tone, and stimulate hair growth.
Antioxidant Strengthener Anti-Inflammatory Agent Tone Evener Anti-Aging Agent Blood Flow Modulator
Biotinoyl Tripeptide-1 GOOD
A biotin-conjugated tripeptide used to support the appearance of stronger, fuller, healthier hair.
Strengthener Conditioner
Acetyl Tetrapeptide-3 GOOD
A biomimetic peptide (the Capixyl active) that supports the appearance of denser, healthier-looking hair by stimulating extracellular-matrix anchoring proteins around the follicle; also used for a firmer-looking skin appearance.
Strengthener Anti-Aging Agent
Larix Europaea Wood Extract GOOD
A larch-wood arabinogalactan extract used to soothe, condition and form a light smoothing film.
Soother Conditioner
Pisum Sativum (Pea) Peptide GREAT
To enhance skin hydration and elasticity, promote even skin tone, and improve hair strength and volume.
Hydrator Antioxidant Strengthener Soother Anti-Inflammatory Agent Barrier Support Tone Evener Anti-Aging Agent
Baicapil™ GOOD
Stimulate follicular stem cells, prolong growth phase, reduce hair shedding, and enhance hair density.
Antioxidant Strengthener Soother Anti-Inflammatory Agent Barrier Support Blood Flow Modulator
Triticum Vulgare (Wheat) Germ Extract GOOD
A vitamin E-rich, wheat-derived botanical that nourishes and conditions skin and hair and provides antioxidant protection.
Antioxidant Emollient Barrier Support
Glycine Soja (Soybean) Germ Extract GOOD
An antioxidant and skin-conditioning botanical active for both skincare and hair care. Its concentrated soy isoflavones (genistein, daidzein) neutralize free radicals, are associated with supporting collagen and elasticity (notably in mature skin), help soothe and even the look of skin tone, and inhibit 5α-reductase — supporting scalp and hair applications alongside facial skincare.
Antioxidant Anti-Aging Agent Tone Evener Soother Barrier Support
Trifolium Pratense (Red Clover) Flower Extract GREAT
Enhance skin resilience, hydration, and radiance; soothe inflammation; stabilize tone; and support scalp health and hair density.
Hydrator Conditioner Antioxidant Soother Anti-Inflammatory Agent Barrier Support Anti-Aging Agent
Camellia Sinensis (Green Tea) Leaf Extract GREAT
Deliver catechin-based antioxidant and anti-inflammatory benefits to support photoprotection, calm irritation, and help normalize excess sebum.
Conditioner Antioxidant Soother Anti-Inflammatory Agent Barrier Support Oil Control Agent Anti-Aging Agent UV Protector
Apigenin GOOD
A purified flavonoid antioxidant used to defend and soothe the look of scalp and skin.
Antioxidant Soother
Oleanolic Acid GOOD
A plant triterpenoid used to antioxidant-protect and support the look of a balanced scalp.
Antioxidant Oil Control Agent
L-Arginine GREAT
Enhances skin hydration, supports collagen synthesis, promotes hair growth, and strengthens hair fibers.
Hydrator Conditioner Antioxidant Strengthener Soother Barrier Support Anti-Aging Agent Blood Flow Modulator
Glycine GOOD
A free amino acid and component of the skin’s Natural Moisturizing Factor, used as a humectant and skin-conditioning agent to support moisture and softness.
Hydrator Conditioner
Calcium Gluconate GOOD
A water-soluble calcium salt used for skin conditioning, chelation (formula stability) and mild humectancy — a gentle cosmetic source of calcium.
Chelating Agent Hydrator
Zinc Chloride GOOD
A soluble zinc salt used as an astringent and scalp oil-balancer.
Astringent Oil Control Agent
Lactic Acid GREAT
Exfoliate dead cells, hydrate, and adjust pH to enhance skin renewal and hair strength.
Hydrator Moisturizer Exfoliant Microbiome Balance Agent Tone Evener Anti-Aging Agent
Gluconolactone GOOD
A gentle polyhydroxy acid (PHA) that provides mild exfoliation, humectant hydration, and antioxidant / chelating support, and reinforces eco-preservative systems.
Exfoliant Hydrator Antioxidant
Dextran GOOD
A naturally derived polysaccharide used as a skin-conditioning humectant, texture / viscosity modifier and gentle carrier.
Hydrator Texture Enhancer
Maltodextrin GOOD
To improve moisture retention, texture, emulsion stability, and product consistency in skin and hair care formulations.
Hydrator Texture Enhancer Oil Control Agent Emulsifier
Hydroxyethylcellulose GOOD
To enhance product viscosity, stability, and texture in skincare and haircare formulations.
Texture Enhancer Emulsifier
Xanthan Gum GOOD
Improves formula viscosity and stability, enhances spreadability, supports skin hydration by forming a moisture-retaining film, and smooths hair appearance.
Hydrator Moisturizer Texture Enhancer Conditioner Soother Barrier Support Emulsifier
Pentylene Glycol GREAT
To elevate cosmetic formulations by delivering efficient hydration, actives solubilization, enhanced texture, and supplemental antimicrobial support—thereby improving both performance and sensory quality.
Hydrator Moisturizer Texture Enhancer Conditioner Soother Barrier Support Solvent Preservative
Dimethyl Isosorbide GOOD
A powerful solvent and penetration enhancer that dissolves and delivers difficult actives.
Solvent
Polysorbate 20 GOOD
To stabilise oil-in-water or water-in-oil mixtures, reduce interfacial tension, solubilise lipophilic actives, and improve formulation texture and performance in skin and hair care systems.
Texture Enhancer Cleansing Agent Emulsifier Solvent
PPG-26-Buteth-26 GOOD
A polymeric solubilizer and co-emulsifier for clear, stable water-based formulas.
Emulsifier Solvent
PEG-40 Hydrogenated Castor Oil GOOD
To facilitate the formation of stable emulsions and sols, improve mixing of oil and water phases, and enhance texture and performance of skincare and haircare formulas.
Texture Enhancer Cleansing Agent Emulsifier Solvent
Trisodium Ethylenediamine Disuccinate GOOD
A biodegradable EDTA-alternative chelator that stabilizes and helps preserve water-based formulas.
Chelating Agent
Sodium Metabisulfite FAIR
A reducing antioxidant used to protect sensitive, oxidation-prone formulas from discoloration.
Antioxidant Preservative
Sodium Benzoate GOOD
Functions as a preservative (antimicrobial), protecting water-containing formulations from yeast, mold, and bacterial spoilage. Its activity is pH-dependent and strongest in acidic systems (optimal below roughly pH 5), so it is used in low-pH products and frequently paired with potassium sorbate for broader, more robust preservation.
Preservative
Phenoxyethanol GOOD
A broad-spectrum cosmetic preservative that protects water-containing formulas against bacteria, yeast and mold.
Preservative
Chlorphenesin GOOD
A mild, stable cosmetic preservative used to broaden and reinforce a preservative system.
Preservative
The information provided in this review is based on internal research and publicly available sources. It is intended for general informational purposes only and does not constitute medical, legal, or regulatory advice. We do not guarantee the accuracy or completeness of this information. Users are encouraged to conduct their own research and consult appropriate professionals before making decisions based on this information.

The manufacturing partners for The Ordinary are not publicly disclosed. Many brands work with multiple contract manufacturers across different regions depending on production volume, product type, and regulatory requirements.

Exact sales numbers for The Ordinary are not publicly disclosed.

The Ordinary has successfully captured market share by focusing on a successful balance of marketing and formulation.

Replicating that success requires more than just copying a formula, it requires identifying a marketing strategy that is unique to your brand’s audience, associated with a great product offering.

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Made in USA
Macro close-up of clear cosmetic serum or essence with visible air bubbles. Ideal for beauty branding, cosmetic ads, skincare ingredient design, or clean and minimal product presentations.