Sienna Naturals • D.N.A. Scalp Serum (densifying scalp serum)

Name: Sienna Naturals • D.N.A. Scalp Serum (densifying scalp serum)
Brand: Sienna Naturals
Price: 50.9 EUR
Availability: OutOfStock

€50,90 EUR

Sienna Naturals' D.N.A. Scalp Serum is a fast-absorbing hair serum formulated with over 21 hair-densifying actives to support daily hair growth and scalp health.

Enriched with rosemary, biotin, aloe vera stem cell extract, and caffeine, it stimulates microcirculation, strengthens hair fibers, and visibly reduces hair loss—with clinically proven results after 8 weeks of daily use.

Fragrance-free, vegan, gluten-free, and dermatologist-approved.

Volume = 30ml

View other Sienna Naturals products

21 Densifying Actives for Advanced Hair Science

D.N.A. Scalp Serum (Density Nourishing Actives) is Sienna Naturals' most advanced anti-hair loss treatment. Its lightweight, fast-absorbing water-based formula combines over 21 scientifically selected active ingredients to support hair growth, strengthen the hair fiber, and stimulate scalp health. Unlike most anti-hair loss serums formulated based on studies conducted exclusively on Caucasian male hair, D.N.A. has been clinically tested on women with textured hair — a first and a strong commitment from the brand.

Rosemary, Biotin, Caffeine, and Aloe Vera Stem Cell Extract

Rosemary extract increases microcirculation and supports hair density and vitality. Biotin, essential for keratin production, strengthens the internal hair structure. Caffeine stimulates follicles and helps reduce hair loss. Aloe vera stem cell extract provides intense hydration and powerful anti-inflammatory properties. Turmeric, Virginia creeper, and safflower extract complete this active complex for comprehensive scalp care.

Clinically Proven Results in 8 Weeks

In an independent panel of 39 women aged 18 to 65 with textured and thinning hair: 90% saw a visible increase in density within 8 weeks, 87% observed apparently stronger hair, and 87% noted a reduction in hair loss after 16 weeks of daily use. These results are measured, documented, and representative of Colorful Black's true customer base.

Before you begin, perform a skin test (patch test).
Shake well before use.
Pump 2 to 3 times to fill the dropper, then apply directly to a dry scalp.
Massage with fingers or a scalp massager and leave to dry.
Use once daily for best results.
Pro tip: apply at night before bed with a massager for maximum absorption overnight.

Water (Aqua), Butylene Glycol, Heptyl Glucoside, Glycerin, Helianthus Annuus (Sunflower) Seed Oil, Biotin, Curcuma Longa (Turmeric) Root Extract, Aloe Vera Callus Extract (Stem Cell), Caffeine, Rosmarinus Officinalis (Rosemary) Flower/Leaf/Stem Extract, Hydrolyzed Walnut Extract, Larix Europaea Wood Extract, Sodium Metabisulfite, Vitis Vinifera Fruit Meristem Cell Culture, Potassium Sorbate, Sodium Benzoate, Phenethyl Alcohol, Citric Acid, Camellia Sinensis Leaf Extract, Hydrolyzed Eruca Sativa Leaf, Zinc Chloride, Pentylene Glycol, Xanthan Gum, Polyglyceryl-3 Diisostearate, Caprylhydroxamic Acid, Aloe Barbadensis Leaf Juice, Carthamus Tinctorius (Safflower) Flower Extract, Hibiscus Sabdariffa Flower Extract, Sodium Phytate, Phenoxyethanol

Why choose Colorful Black?

Fast delivery France / Europe / Overseas

Free delivery to a collection point * on orders over €79

Also available in our Paris store

Payment in 3 installments with no fees (Scalapay)

Available at : 01 42 36 54 14 or message

Why choose Sienna Naturals • D.N.A. Scalp Serum (densifying scalp serum) ?

90% increase in hair density in 8 weeks

Clinically proven results on women with textured hair: 90% saw a visible increase in density after 8 weeks of daily use. Real figures, obtained from the hair profiles of Colorful Black customers.

21 densifying actives: rosemary, biotin, caffeine, and aloe vera

Rosemary for circulation, biotin for keratin, caffeine for follicles, aloe vera stem cell extract for hydration and soothing — a rare scientific concentrate in a single, lightweight, fast-absorbing serum.

The first anti-hair loss serum tested on textured hair

Almost all studies on hair loss are conducted on Caucasian men. Sienna Naturals chose to test its D.N.A. Serum on women with textured hair — a unique and committed approach that guarantees truly representative results.

Fragrance-free, vegan, gluten-free, and dermatologist-approved

An ultra-clean formula designed for sensitive scalps: no added fragrance, vegan, gluten-free, and dermatologically tested. Use with complete confidence, even on the most reactive scalps.

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Frequently Asked Questions about Sienna Naturals • D.N.A. Scalp Serum (densifying scalp serum)

Can D.N.A. Serum be used daily?

Yes, this is Sienna Naturals' recommendation for optimal results. This is also the protocol followed in their independent clinical study.

When do the first results become visible?

90% of participants experienced increased density after 8 weeks of daily use. For a visible reduction in hair loss, results are observed after 16 weeks.

How long does one bottle last?

A 30 ml bottle lasts approximately 1 month, depending on the amount applied and the number of areas treated daily.

Does this serum work on non-textured hair?

The clinical study was conducted on women with textured hair. However, the brand believes that the formula, designed to solve complex hair problems, is effective on many other hair types.

Does this serum replace medical treatment for hair loss?

No, it is not a medication. It is a clinically tested cosmetic treatment that supports hair density and vitality. In cases of severe hair loss, a medical consultation is still recommended.

Can it be used under protective styles like braids?

Yes, apply directly to the exposed scalp between braids. Its light, non-greasy texture leaves no visible residue.