Just a heads-up: we're in the middle of moving from BC to Ontario, so your order will ship the week of October 19th. Thanks so much for your patience while we settle in.
Chronologiste Overnight Youth Serum by Kérastase is an age-corrective night treatment infused with Pro-Xylane™ and Ochrophyta Algae, designed to reverse visible signs of aging overnight.
Targeting dryness, dullness, frizz, lack of volume and thickness, this leave-in serum delivers intensive overnight care. Its transformative quick-break texture melds instantly into the hair's length, leaving a perfect finish. Wake up to fuller, healthier, smoother hair.
How to Use
• Spread one pump into your hands and distribute evenly on dry or damp hair before bed, focusing on your lengths and ends
• Do not rinse out in the morning
In the event of direct contact with your eyes, rinse them immediately and thoroughly.
Is it right for me?
Best for: Ageing hair that feels thinner, weaker, dry, or dull and needs an overnight boost. All hair types.
Skip if: You want a wash-day-only routine. This is a nightly step.
Frequency: Nightly. Smooth one to two pumps through dry or damp lengths and ends before bed. Leave-in; no rinsing.
An advanced molecule born from green chemistry, derived from a natural sugar found in beech wood. A superstar in anti-aging skincare, it strengthens and deeply hydrates hair, plumping each strand for a fuller, thicker look, so aging hair feels healthier, stronger, and more youthful.
A bio-sourced deep-sea algae, rich in antioxidants, minerals, and nutrients that help revitalize hair and the scalp as they age. It replenishes and protects against the daily stress that leaves hair looking dull and tired, so strands look revived, healthier, and full of youthful vitality.
You catch your reflection, and your hair just looks a little thinner and flatter than it used to. Hair ages the way skin does: over time, each strand grows finer and weaker, loses density, and holds onto moisture and shine less. So it can look tired and miss the body you remember.
Why this product solves it
This overnight serum works while you sleep to target age-related thinning. Pro-Xylane, a patented anti-aging molecule (the same kind used in skincare), helps rebuild and plump the fibre so strands feel thicker and stronger, while mineral-rich Ochrophyta algae (kelp) revitalizes and nourishes tired hair. Smooth one pump through your lengths at night, and it works while you sleep- no rinsing in the morning.
What to expect over time
You'll wake up to softer, shinier hair, and with regular nightly use, Kérastase measures strands about 5.7% thicker in diameter, 66% less frizz, and up to 92% stronger. It's a slow-build treatment, so the fuller, healthier feel really shows the longer you use it.
5 stars: 1 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)
J
Jessica Arril
I have been a die hard cicanuit user but am in my 40s so thought I would give this a try/add it into my routine. OMG- my hair was extra soft and extra smooth after the first use. Beyond happy and beyond impressed. Everyone over 40 needs this at night
Contact Us
Online Orders
Please email orders@pommesalon.ca with your order ID and we will do our best to return your inquiry between the hours of 9am - 5pm.
Chronologiste Overnight Youth Serum by Kérastase is an age-corrective night treatment infused with Pro-Xylane™ and Ochrophyta Algae, designed to reverse visible signs of aging overnight.
Targeting dryness, dullness, frizz, lack of volume and thickness, this leave-in serum delivers intensive overnight care. Its transformative quick-break texture melds instantly into the hair's length, leaving a perfect finish. Wake up to fuller, healthier, smoother hair.
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