Kérastase Chronologiste Overnight Youth Serum – Anti-Aging Overnight Hair Serum

Kérastase Chronologiste Overnight Youth Serum is a leave-in night serum, designed to regenerate and rejuvenate hair during sleep. Its advanced formula, enriched with Pro-Xylane™ and Ochrophyta algae, acts deep within the hair fiber to correct the 5 visible signs of hair aging: dryness, dullness, frizz, lack of volume, and loss of density.

The ultra-light "quick-break" texture is instantly absorbed into the hair strand, without leaving residue and without staining the pillow. The serum can be applied to both dry and damp hair, providing intensive treatment throughout the night.

Benefits after a single night

• increased hair strand diameter by +5.7%*
• reduced frizz by -66%*
• amplified shine by +32%*
• increased resistance by +92%*
• 77% of consumers state that hair feels revitalized**

*Instrumental test after a single use of the serum
**Consumer test after the complete Chronologiste routine (bain + mask + night serum)

Frequently asked questions about the night routine

• No need to rinse hair in the morning; the formula is completely absorbable
• Can be used on both dry and damp hair
• Does not stain the pillow and leaves no traces
• The Chronologiste fragrance is luxurious, floral, and discreet
• Acts on the 5 signs of aging, for denser, smoother, and visibly healthier hair

Key ingredients

• Pro-Xylane™ – an anti-aging molecule with deep regenerative action
• Ochrophyta Algae – a marine ingredient with intense revitalizing power
• "Quick-break" texture – allows instant absorption and a smooth finish

Instructions for use

• apply in the evening to dry or damp hair
• distribute one pump along lengths and ends
• no need to rinse in the morning
• avoid contact with eyes, and in case of contact, rinse immediately with plenty of water