Overnight Youth Serum by Kérastase is a night treatment infused with Pro-Xylane™ and Ochrophyta Algae, designed to reverse the visible signs of ageing during nighttime. Targeting dryness, dullness, frizz, lack of volume and thickness, this leave-in serum delivers intensive overnight care. Just one pump to deliver powerful actives deep into the hair. Powered by Pro-Xylane™, a molecule known for its anti-ageing action, and Ochrophyta Algae, the fastest growing algae in the world, a bio-sourced deep sea treasure that captures the regenerative power of the ocean. Its transformative quick-break texture melds instantly into the hair's lengths, leaving a flawless finish and enveloping the hair with the signature Chronologiste fragrance that turns routine care into a luxurious ritual.
Wake up to fuller, healthier looking, smoother hair*.
*Consumer test after application of Bain + Mask + Night Serum, 90 Consumers
Apply to dry or damp hair before bedtime. ,vr>Spread one pump into hands and distribute evenly through lengths and ends. No need to rinse.
Standard delivery fees apply on all orders. Republic of Ireland orders are €4.95, and Northern Ireland orders are £3.99.
Free delivery is available on orders over €50 / £50.
Peter Mark does not currently ship internationally.
Orders are delivered using DPD or An Post Expresspost Parcel Service, and must be signed for on receipt. Delivery usually takes 1-3 working days, and you can track your order using the tracking code sent by email once your order has been dispatched.
All products are subject to availability, and delays may occasionally occur outside of our control. If an item in your order is unavailable, we will contact you with an estimated availability date. Please note that during busy sale periods, delivery times may be longer.
Returns policy
You can return unused items for a full refund within 14 days of delivery under distance selling regulations. Items must be unused, with all seals intact and in re-saleable condition.
How to Return an Item
All returns must be accompanied by proof of purchase. When returning your item, please include a short note with:
Your name
Your order number
The reason for return
To get a return order number, please email onlinesales@petermark.ie or call +353 1 6443870 Monday to Friday, 7am to 3pm.
Faulty Items & Warranties
Faulty items are covered in line with the manufacturer’s warranty. Warranties cover repairs or replacements required due to defective materials or workmanship only. They do not cover damage caused by poor maintenance, accidental damage, normal wear and tear, or misuse.
Warranty Periods
Hairdryers
ETI Turbo, ETI Digital and ghd hairdryers for domestic use: 12 months
ghd Helios for domestic use: 2 years
All hairdryers for professional use: 6 months
SteamPod
All SteamPod products: 12 months
If a fault is found, please call 01 6774003 (ROI) or 0345 602 1454 (NI) to arrange a replacement
ghd Styling Irons
All ghd styling irons, including the Unplugged cordless styler: 24 months
ghd Platinum+: 36 months
Important Information for ghd Returns
All ghd returns are tested in Peter Mark salons. If no fault is found, the item will not be replaced. Customers can appeal directly to ghd by calling 0044 1924 423 400 or through ghd online support.
If a replacement is issued, it will carry the remaining warranty period of the original product or an additional 180 days for ghd products, whichever is longer.
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