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Description
DECORTÉ AQ Boosting Treatment Hair Serum — Luxury Japanese Hair Repair Serum 200ml
A prestige booster-essence (導入美容液) for hair from DECORTÉ's iconic AQ skincare line — now reimagined for hair. Formulated with Birch Tree Sap and exclusive Mucina Gigantea flower extract, this serum wraps each strand in a moisture-rich film, visibly reducing breakage and frizz after a single use. Awarded @cosme Best Cosmetics 2025 #1 Hair Treatment. Shipped directly from Kobe, Japan.
Key Benefits
- Intense moisture restoration — Birch Tree Sap (natural humectant) delivers deep hydration to dry, brittle strands, improving elasticity from the inside out.
- Breakage prevention — Polyquaternium-51 forms a protective film along the hair shaft, reducing mechanical damage from brushing, heat styling, and friction.
- Frizz control and shine enhancement — Mucina Gigantea flower extract smooths the cuticle layer for a glossy, polished finish that lasts through the day.
- Prestige formula in the spirit of DECORTÉ AQ — Gentle enough for color-treated, permed, and chemically processed hair; designed with delicate scalp areas in mind.
- Sensory luxury experience — Rich, creamy texture with DECORTÉ's signature AQ fragrance transforms your weekly shower into a salon-level ritual.
Product Details
| Brand | DECORTÉ (コーセー コスメデコルテ) |
|---|---|
| Product Name (JP) | コスメデコルテ AQ ブースティング トリートメント ヘア セラム |
| Size | 200ml |
| Product Type | Booster essence (導入美容液) for hair — applied between shampoo and conditioner |
| Hair Types | All hair types; especially suited for dry, damaged, color-treated hair |
| Frequency | 2–3 times per week (or as needed) |
| Country of Origin | Japan |
| @cosme Award | Best Cosmetics 2025 — #1 Hair Treatment |
Who Is This For?
This serum is ideal for anyone who wants a noticeable improvement in hair softness and shine without a heavy, weighed-down feeling. It's particularly well-suited for women with color-treated or heat-damaged hair, for those experiencing frizz in humidity-heavy climates, and for beauty enthusiasts who appreciate the craftsmanship of Japanese prestige skincare applied to hair care. If you already love DECORTÉ's AQ skincare line, this is a natural extension of that ritual into your haircare routine.
How To Use
This serum works as a booster essence — applied between shampoo and conditioner. The serum itself is not rinsed directly; your regular conditioner layers over it, and everything rinses out together.
- After shampooing, gently squeeze excess water from your hair.
- Apply 1–2 pumps (4 for medium-length hair) to damaged areas — mid-lengths and ends. Avoid the scalp.
- Work the serum through with your fingers for even coverage.
- Do not rinse. Immediately layer your regular conditioner or hair mask on top.
- Leave for 2–3 minutes.
- Rinse thoroughly with lukewarm water — serum and conditioner together.
- Proceed with your usual drying and styling routine.
Use 2–3 times per week.
Full Ingredients
Water, Cetearyl Alcohol, Behentrimonium Chloride, Glycerin, Birch Tree Sap (Betula Alba Juice), Birch Bark Extract (Betula Alba Bark Extract), Mucina Gigantea Flower Extract, Polyquaternium-51, Cyclopentasiloxane, Dimethicone, Phenoxyethanol, Methylparaben, Fragrance (Parfum).
Note: Full INCI list to be confirmed from supplier documentation. Above list based on brand and retailer sources; verify before publishing.
Cautions & Warnings
- For external use on hair only. Do not apply to scalp if sensitive; avoid direct contact with eyes.
- If irritation or redness occurs, discontinue use and consult a dermatologist.
- Keep out of reach of children.
- Store away from direct sunlight and extreme temperatures.
- Contains fragrance (Parfum) — not suitable for those with fragrance allergies.
- Contains Methylparaben — check suitability if avoiding parabens.
Package Contents
- 1 × DECORTÉ AQ Boosting Treatment Hair Serum, 200ml pump bottle
Shipping & Store Notes
- Ships directly from Japan.
- Processing time: 2–6 business days.
- Tracking number provided after dispatch.
- Import duties and taxes may apply depending on destination country.
- Opened cosmetics and supplements cannot be returned for hygiene and safety reasons.
Authenticity Guarantee
All DECORTÉ products sold at Tsujimoto Market are 100% authentic, sourced directly from authorized Japanese distributors. We ship from Kobe, Japan — no parallel imports, no counterfeits. Every order comes with a satisfaction guarantee.
FAQ
Is this a rinse-off or leave-in treatment?
It is a booster essence — applied between shampoo and conditioner. The serum itself is not rinsed directly; your regular conditioner layers over it, and everything rinses together with lukewarm water. It is not a leave-in (it does not stay on dry hair).
Can I use it every day?
Yes, it is gentle enough for daily use. For best results, use 2–3 times per week as an intensive treatment. Daily use is fine for maintenance and softness.
Is it suitable for color-treated hair?
Yes. DECORTÉ formulated this serum to be safe for color-treated, permed, and chemically processed hair without stripping color.
Does it weigh hair down?
The serum-like texture is designed to be lightweight. Apply primarily to mid-lengths and ends to avoid buildup near the roots.
What does it smell like?
It carries the signature DECORTÉ AQ fragrance — refined, elegant, and subtly floral. The scent lingers gently after rinsing.
Is it cruelty-free?
DECORTÉ products are sold in Japan where animal testing is not required for cosmetics. However, DECORTÉ is a brand under KOSÉ Corporation; please check KOSÉ's current cruelty-free policy for full details.
