KERASTASE CHRONOLOGISTE Youth Night Serum

Kérastase Youth Night Serum is an age-correcting night treatment infused with Pro-Xylane™ and Ochrophyta algae, designed to correct the visible signs of hair ageing overnight. 

Targeting dryness, dullness, frizz, loss of volume and thickness, this leave-in serum provides intensive night-time care. A single application is enough to deliver powerful active ingredients to the heart of the hair fibre. 

Enriched with Pro-Xylane™, a green chemistry molecule renowned for its exceptional anti-ageing action, and Ochrophyte algae, the fastest-growing algae in the world, a bio-sourced treasure from the depths of the sea that captures the regenerative power of the ocean. 

Its transformative "quick-break" texture instantly melts into the lengths, leaving a perfect finish and enveloping the hair in the signature Chronologiste fragrance, which transforms the care routine into a luxurious ritual. 

Apply to dry or towel-dried hair before bedtime. Dispense one pump into your hands and distribute evenly through the lengths and ends. No need to rinse.

Wake up to thicker, healthier and softer hair. 

BENEFITS FROM THE FIRST NIGHT
5.7% increase in fibre diameter**
-66% frizz*
+32% shine* 
92% stronger hair*
77% of women who tried it say their hair feels revitalised**
*Instrumental test after 1 use of Youth Night Serum
**Consumer test on 90 women after 1 use of the Chronologiste routine: shampoo + mask + Youth Night Serum

FOR WHAT TYPE OF HAIR?
For hair weakened by the effects of time: dryness, dullness, loss of volume and thickness, frizz. 

HAIR LONGEVITY

Since 1900, life expectancy has doubled. Today's women are no longer those of yesterday: they are liberated, daring and committed to the quest for a better life. For these women, confidence is essential, and their hair plays a key role in expressing their individuality and sense of youth. However, like skin, hair also undergoes the ageing process. 

After decades of in-depth scientific research, L'Oréal has succeeded in deciphering the complex science of hair ageing. KÉRASTASE has identified five key signs of mature hair: dryness, dullness, frizz, loss of volume and density. 

To visibly reduce these signs, KÉRASTASE presents Chronologiste: an expert routine that directly transposes advances in skincare science to haircare. This transformative approach offers immediate results, revealing visibly denser, smoother and healthier hair from the very first night.