Nécessaire Scalp Serum — 5% Capixyl + 1% Hyaluronic Acid, 1 fl oz | Fragrance-Free, NEA-Approved

Nécessaire The Scalp Serum is a daily, water-light treatment that supports the appearance of fuller, thicker-looking hair while calming dry scalp with 1% hyaluronic acid.

This fragrance-free serum blends a 5% Capixyl™ complex with humectant and barrier-supporting ingredients to deliver a lightweight, non-greasy formula designed for daily use. The product is dermatologist-tested, hypoallergenic, vegan, cruelty-free, and carries the National Eczema Association Seal of Acceptance, making it suitable for sensitive scalps that need consistent scalp-care routine support.

How does this serum fit into my daily hair routine?

Use the serum once daily on damp or dry hair to target thinning areas or to apply all over the scalp. The pipette applicator makes portion control simple—massage in and leave on, then style as usual. Regular, consistent application is recommended for visible improvement in hair fullness over time.

• Apply with the included pipette—one squeeze fills the pipette half full.
• Use on specific areas of concern or across the entire scalp.
• Leave in; no rinsing required so it fits into morning or evening routines.
• 30 ml bottle equates to approximately a 30-day supply with daily use.

What key actives are inside and what do they do?

The serum combines 5% Capixyl™, a peptide-botanical complex, with 1% hyaluronic acid plus vitamins B3 and B5 and ApiScalp. Capixyl™ is included to support the appearance of thicker hair, while hyaluronic acid delivers hydration to soothe dryness. B vitamins and ApiScalp help support the scalp’s protective barrier and overall scalp health when used regularly.

• 5% Capixyl™: formulated to support fuller-looking hair.
• 1% Hyaluronic Acid: hydrates and helps soothe dry scalp.
• Niacinamide (Vitamin B3) and Panthenol (Vitamin B5): nourish and support barrier function.
• ApiScalp: botanical support for scalp comfort.

Is this product suitable for sensitive or eczema-prone scalps?

Yes—this serum is fragrance-free, dermatologist-tested, hypoallergenic, and non-comedogenic. It has earned the National Eczema Association’s Seal of Acceptance, indicating formulation consideration for those with sensitive scalps. Always patch-test if you have a history of ingredient sensitivities.

• Fragrance-free and hypoallergenic formulation.
• National Eczema Association Seal of Acceptance awarded.
• Non-comedogenic and dermatologist-tested for cautious use.
• Cruelty-free and certified vegan for ethical shoppers.

How will packaging and sustainability affect my purchase?

Nécessaire packages the serum in a recyclable glass bottle and participates in multiple environmental certifications. The brand is Certified B Corp, Climate Neutral, and Plastic Neutral, and supports reforestation and responsible sourcing initiatives. These credentials reflect an emphasis on reducing footprint alongside product performance.

• Recyclable glass bottle and How2Recycle partnership.
• Certified B Corp, Climate Neutral, and Plastic Neutral.
• FSC-certified materials and 1% For The Planet membership.

Who is this for: This serum is aimed at anyone who wants a lightweight, everyday scalp treatment to support the look of thicker, fuller hair without fragrance or heavy residue. It suits those with dry or sensitive scalps, people seeking scalp-first haircare, and shoppers who prioritize dermatological testing and environmental responsibility. If you want a daily, leave-in scalp product with targeted actives and a clean formulation, The Scalp Serum is a practical addition to your routine.

Ingredients

Aqua/Water/Eau, Butylene Glycol, Propanediol, Sodium Hyaluronate, Acetyl Tetrapeptide-3, Niacinamide, Panthenol, Trifolium Pratense (Clover) Flower Extract, Apium Graveolens (Celery) Seed Extract, Camellia Sinensis Leaf Extract, Biotinoyl Tripeptide-1, Nicotiana Benthamiana Hexapeptide-40 sh-Polypeptide-86, Nicotiana Benthamiana Hexapeptide-40 sh-Polypeptide-9,Nicotiana Benthamiana Octapeptide-30 sh-Oligopeptide-2, Sodium Tocopheryl Phosphate, Dextran, 1,2-Hexanediol, Caprylhydroxamic Acid, Citric Acid, Glycerin.