Why We Picked This Kérastase 8H Magic Night Serum
- Plant-based proteins deliver essential nutrients that help dry hair retain moisture and regain softness overnight.
- Niacinamide locks in hydration for longer-lasting strength and a smoother surface that resists frizz.
- The lightweight formula absorbs fully, protecting hair from pillow friction while enhancing shine by morning.
Key Ingredients & Features
Plant-based proteins Dry strands absorb nourishment that improves softness and resilience, so hair feels less brittle and more manageable after eight hours.
Niacinamide for lasting hydration Moisture stays locked in, helping hair maintain strength and reducing the rough texture that leads to frizz.
Pillow-friction protection Hair stays smoother because the serum creates a light barrier that minimizes breakage and roughness caused by tossing against fabric.
No-rinse overnight formula One to two pumps work through the night and leave no residue, so you wake up to shiny, detangled hair ready for the day.
Quick Facts
| Attribute | Details |
|---|---|
| Size / Volume | 3.04 Fl Oz (90 ml) |
| Key Ingredients | Plant-based proteins, niacinamide |
| Hair Type | All hair types, especially dry |
| Free-From Claims | Paraben-free |
| Usage Frequency | Three nights per week |
| Scent | Floral |
| Form | Leave-in serum (oil texture) |
Pros & Cons
Pros
- Delivers noticeable softness, shine, and frizz reduction after a single overnight use.
- Absorbs cleanly without staining pillows or leaving greasy residue.
- Suitable for all hair types that experience dryness or friction damage.
- Lightweight enough for regular use three nights a week.
Cons
- Premium price point compared with many drugstore overnight treatments.
- Best results appear with consistent use rather than occasional application.
How It Works & What to Expect
Apply Kérastase 8H Magic Night Serum to dry or slightly damp lengths and ends before bed. The plant-based proteins and niacinamide begin nourishing and sealing moisture into the hair shaft while you sleep. By morning the serum has fully absorbed, leaving strands softer, easier to detangle, and visibly shinier with less frizz. Pillow friction is reduced, so ends feel less rough. The floral scent is subtle and does not linger heavily. Most notice improved smoothness and hydration after the first night, with cumulative strength and shine when used three times weekly as recommended.
Best For / Hair Type & Concern
- Dry hair that feels rough or lacks shine
- Frizzy hair seeking overnight smoothness
- All hair types prone to dryness or pillow friction
- Color-treated or chemically processed hair needing extra nourishment
- Anyone looking for a no-rinse overnight hair serum that absorbs cleanly
Quick Q&A
How does Kérastase 8H Magic Night Serum reduce frizz overnight? The formula hydrates and seals the cuticle with plant-based proteins and niacinamide while protecting against pillow friction, so hair wakes up smoother and less prone to frizz.
Can I use this overnight hair serum on damp hair? Yes. It works on both dry and damp hair. Apply one to two pumps to lengths and ends, leave in overnight, and style as usual in the morning—no rinsing required.
Is Kérastase 8H Magic Night Serum suitable for all hair types? It is formulated for all hair types, with particular benefits for dry or frizzy hair that needs intense overnight nourishment and protection.
What Shoppers Are Saying
With a 4.6-star average from more than 10,000 reviews, users frequently praise the soft, shiny results and the way hair feels detangled and smoother by morning. Many note that the serum absorbs without greasiness and effectively reduces overnight frizz and dryness.
How to Use & Care Tip
Before bed, dispense one to two pumps into your palms and distribute evenly through the lengths and ends of dry or damp hair, avoiding the roots. Leave the serum in overnight—no rinsing needed. For best results, use three nights a week and pair with a hydrating conditioner or mask during daytime washes to maintain moisture levels. A heat protectant on styling days further supports the overnight nourishment.
Wake up to softer, shinier hair with less effort. Add Kérastase 8H Magic Night Serum to your cart and make overnight repair part of your routine.
