Overnight Youth Serum by Kérastase is a night treatment infused with Pro-Xylane™ and Ochrophyta Algae, designed to reverse the visible signs of ageing during nighttime.
Targeting dryness, dullness, frizz, lack of volume and thickness, this leave-in serum delivers intensive overnight care. Just one pump to deliver powerful actives deep into the hair.
Powered by Pro-Xylane™, a molecule known for its anti-ageing action, and Ochrophyta Algae, the fastest growing algae in the world, a bio-sourced deep sea treasure that captures the regenerative power of the ocean.
Its transformative quick-break texture melds instantly into the hair’s lengths, leaving a flawless finish and enveloping hair with the signature Chronologiste fragrance that turns routine care into a luxurious ritual.
HAIR BENEFITS AFTER 1 NIGHT
Up to 66% less frizz*
Up to 32% more shine*
Up to 92% less breakage*
77% say their hair feels revitalised**
*Instrumental test after 1 use of Overnight Youth Serum
**Consumer test after one application of full Chronologiste routine, bain+masque+Overnight Youth Serum
How to use:
Step 1: Apply on dry or damp hair before bedtime.
Step 2: Spread one pump into hands and distribute on lengths and ends.
Step 3: No need to rinse in the morning.
In case of direct contact with eyes, rinse immediately and thoroughly.
Key Ingredients:
- Pro-Xylane™: A molecule from green chemistry, known for reinforcing fibre structure and increasing hair thickness.
- Ochrophyta Algae: A bio-sourced marine extract rich in regenerative minerals, protecting hair against daily aggressors and providing deep revitalisation.
Ingredients: AQUA / WATER / EAU • DIMETHICONE • GLYCERIN • ISOPROPYL MYRISTATE • PHENOXYETHANOL • POLYACRYLAMIDE • C13-14 ISOALKANE • LAURETH-7 • BENZYL SALICYLATE • HEXYL CINNAMAL • BENZYL ALCOHOL • LINALOOL • TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES • CARVONE • CITRUS AURANTIUM PEEL OIL • LIMONENE • POGOSTEMON CABLIN OIL • CITRONELLOL • LINALYL ACETATE • GERANIOL • HYDROXYCITRONELLAL • MACROCYSTIS PYRIFERA EXTRACT / KELP EXTRACT • HYDROXYPROPYL TETRAHYDROPYRANTRIOL • BENZALDEHYDE • GERANYL ACETATE • COUMARIN • CITRIC ACID • TRIMETHYLBENZENEPROPANOL • ROSE KETONES • PROPYLENE GLYCOL • BETA-CARYOPHYLLENE • POTASSIUM SORBATE • SODIUM BENZOATE • PARFUM / FRAGRANCE

