Kérastase Chronologiste Overnight Youth Hair Serum
Kérastase Chronologiste Overnight Youth Hair Serum90 ml
Save $27.05 CAD - 25% Off
Kérastase Chronologiste Overnight Youth Hair Serum is a lightweight leave in overnight hair treatment designed to target visible signs of ageing hair, including dryness, dullness and loss of softness. Powered by Pro-Xylane™ to help strengthen the hair fibre and Ochrophyta Algae to deeply hydrate and revitalise, it works overnight to smooth frizz, improve softness and leave hair fuller and healthier looking by morning.
Why you need it
Why you need it
Kérastase Chronologiste Overnight Youth Hair Serum is an intensive overnight treatment designed to support ageing hair by restoring moisture, strength and overall hair quality while you sleep. Formulated with Pro-Xylane™, known for its strengthening properties, it helps reinforce the hair fibre and improve resilience, while Ochrophyta Algae works to deeply hydrate and replenish dry, dull lengths.
As the serum absorbs into the hair overnight, it helps smooth the cuticle, reduce frizz and improve softness without leaving residue or weighing the hair down. The result is hair that feels more supple, looks shinier and is easier to manage, with improved body, bounce and movement over time.
This treatment is scented with the signature Chronologiste fragrance of bergamot, rose and musk for a subtle, luxurious scent that lingers in the hair throughout the day.
Hair benefits after just one night:
- Up to 66% less frizz*
- Up to 32% more shine*
- Up to 92% less breakage*
- 77% say their hair feels revitalised**
The experience is elevated by the signature Chronologiste fragrance of bergamot, rose and musk.
*Instrumental test after 1 use of Overnight Youth Serum
**Consumer test after one application of full Chronologiste routine, bain+masque+Overnight Youth Serum
Test Results Source: Kérastase
how to use
how to use
Key Ingredients
Key Ingredients
A powerful molecule known for its anti-ageing properties, helping to reinforce the hair fibre, improve strength and enhance the appearance of thicker, fuller hair.
Ochrophyta Algae
A bio-sourced marine extract rich in regenerative minerals, helping to deeply hydrate and protect against daily damage and revitalise dry, dull hair.

INGREDIENTS
INGREDIENTS
About the Brand
About the Brand
Kérastase is a professional French haircare brand known for advanced, science backed formulas that target specific hair concerns, from dryness and damage to frizz, thinning and dullness. Whether you need repair with Kérastase Première, nourishment with Kérastase Nutritive, or brightness with Kérastase Blond Absolu, each range is designed to deliver visible results. Kérastase shampoos, conditioners, masks, and oils work together to leave hair healthier, stronger and more radiant, with professional salon results at home.

SHIPPING & RETURNS
SHIPPING & RETURNS
Ireland Tracked Delivery
Delivery 1-2 Working Days
Delivered Mon - Fri
Tracked
Free on orders over €50.00
Ireland Next Day Delivery
Orders placed before 3pm
Tracked
SMS & Email Updates
Delivery Next working day Monday to Friday excl Bank Holidays
FREE L’Oréal Professionnel Metal Detox Shampoo

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