The Ordinary Multi-Peptide Serum for Hair Density

An Advanced Multi-Peptide Scalp Serum That Supports Hair Density, Reduces Thinning, and Promotes a Healthy Hair Growth Environment

Experience visibly fuller, denser hair with The Ordinary Multi-Peptide Serum for Hair Density. This concentrated, science-driven scalp serum is formulated with a powerful cocktail of multiple peptide technologies, Caffeine, Biotin, and REDENSYL® — each targeting a different mechanism of hair thinning to deliver comprehensive support for hair density and scalp health. Developed by DECIEM, the brand behind The Ordinary, this serum reflects the same commitment to clinical efficacy, ingredient transparency, and accessible pricing that defines the entire range.

Applied directly to the scalp, the lightweight serum absorbs quickly to deliver active ingredients where they’re needed most — at the follicular level — to support the conditions for a fuller, thicker-looking head of hair over time with consistent use.

Product Benefits

✦ Multi-Peptide Complex for Hair Density
A combination of advanced peptide technologies including Biotinoyl Tripeptide-1, Acetyl Tetrapeptide-3, and sh-Polypeptide-76 work at the follicular level to support the hair growth cycle and promote a denser, fuller appearance over time.

✦ REDENSYL® for Follicular Stem Cell Activation
REDENSYL® is a patented, clinically studied ingredient that targets follicular stem cells to support the transition from the resting (telogen) phase back to the active growth (anagen) phase, helping to reduce hair thinning and promote new hair growth.

✦ Caffeine for Scalp Stimulation
Caffeine stimulates the scalp and supports healthy hair follicle activity, helping to counteract the effects of DHT — a key contributor to hair thinning — and promote a more favorable environment for hair growth.

✦ Biotin (Vitamin B7) for Hair Strength
Biotin plays a key role in keratin production, supporting the structural strength and integrity of the hair shaft for visibly stronger, less breakage-prone hair.

✦ Procapil® for DHT Inhibition & Follicle Nourishment
Procapil® combines Biotinoyl Tripeptide-1, Apigenin, and Oleanolic Acid to fight hair aging by inhibiting DHT, improving follicle nourishment, and strengthening the hair root anchoring.

✦ Lightweight, Non-Greasy Scalp Formula
The water-based, lightweight texture absorbs quickly into the scalp without leaving residue or weighing hair down — suitable for all hair types including fine and thin hair.

✦ Clinically Inspired, Ingredient-Led Formulation
Developed by DECIEM with The Ordinary’s signature commitment to ingredient transparency, evidence-based formulation, and affordability.

Suitable Hair Types & Concerns

Thinning Hair: The primary target — the multi-peptide and REDENSYL® complex specifically addresses the key mechanisms behind hair thinning for visibly denser-looking hair.

Fine & Low-Density Hair: Supports the appearance of greater volume and fullness at the follicular level for a thicker-looking head of hair over time.

All Hair Types: The lightweight, scalp-targeted formula is suitable for all hair types and textures, including straight, wavy, curly, and coily hair.

All Genders: Formulated to address hair thinning across all genders, including androgenetic alopecia patterns in both men and women.

Colour-Treated Hair: The scalp-applied, non-rinsed formula is safe for use on colour-treated and chemically processed hair.

Areas It Is Particularly Suitable For

Scalp • Hairline • Crown • Temples • Areas of Visible Thinning

Brand: The Ordinary (DECIEM)
Product Type: Multi-Peptide Hair Density Serum
Size: 60ml
Country of Origin: Canada
Key Ingredients: Biotinoyl Tripeptide-1 · Acetyl Tetrapeptide-3 · REDENSYL® · Caffeine · Biotin · Procapil®