Kerastase Chronologiste Overnight Youth Serum 90ml

Kerastase Chronologiste Overnight Youth Serum is an age-corrective night treatment designed to reduce the visible signs of hair ageing while you sleep.

Infused with Pro-Xylane™ and Ochrophyta Algae, the lightweight formula helps revitalise the hair fibre, improve strength, reduce frizz and enhance shine overnight.

Its transformative quick-break texture melts instantly into the lengths and ends, leaving hair with a smooth, refined finish while enveloping it in the signature Chronologiste fragrance.

Benefits

• Helps reduce visible signs of hair ageing
• Revitalises the hair overnight
• Helps increase the appearance of hair fibre thickness
• Reduces frizz
• Enhances shine
• Improves hair strength
• Leaves hair feeling smoother and more refined
• Lightweight leave-in formula
• +5.7% increase in fibre diameter after one use*
• 66% less frizz after one use*
• +32% shine after one use*
• +92% more strength after one use*
• 77% said their hair felt revitalised**

*Instrumental test after one use of Overnight Youth Serum.
**Consumer test after one application of the full Chronologiste routine: Bain + Masque + Overnight Serum.

Key Ingredients

Pro-Xylane™
A green chemistry molecule used in the formula to help target the visible signs of hair ageing.

Ochrophyta Algae
A bio-sourced deep-sea algae selected for its regenerative properties and ability to support healthier, more revitalised-looking hair.

Made Without

Parabens.

How to Use

Apply to dry or damp hair before bedtime.

Spread one pump between the hands and distribute through the lengths and ends.

Leave in overnight.

There is no need to rinse in the morning.

In case of direct contact with eyes, rinse immediately and thoroughly.

FAQs

Who is Kérastase Chronologiste Overnight Youth Serum best for?
It is ideal for hair showing visible signs of ageing, including frizz, dullness, reduced strength and loss of thickness.

Do I need to rinse it out in the morning?
No. The serum is designed to remain in the hair overnight and does not need to be rinsed out the following morning.

Can I apply it to dry hair?
Yes. It can be applied to either dry or damp hair before bedtime.

How much should I use?
Use one pump and distribute it evenly through the lengths and ends.

Does it help with frizz?
Yes. Instrumental testing showed 66% less frizz after one use.*

Does it help strengthen the hair?
Yes. Instrumental testing showed +92% more strength after one use.*

*Instrumental test after one use of Overnight Youth Serum.