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Shop AllOvernight Youth Serum by Kérastase is an age-corrective night treatment infused with Pro-Xylane™ and Ochrophyta Algae, designed to reverse the visible signs of aging during night time.
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 green chemistry molecule known for its ultimate anti-aging 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 perfect finish and enveloping the hair with the signature Chronologiste fragrance that turns routine care into a luxurious ritual.
Application:
Step 1: before bedtime, your hair can be either dry or damp.
Step 2: take one pump of the overnight youth serum into your hands.
Step 3: gently spread the serum between your palms and distribute it evenly through the lengths and ends of your hair. There's no need to apply it directly to the scalp unless specified for specific concerns.
Step 4: do not rinse in the morning. Let the serum work its magic as you sleep
Online Refund & Exchange Purchase Policy
Last updated: September 2026
The following cannot be returned or exchanged:
Items from Lebanese Designers may be exchanged directly at the respective brand’s store. Gift orders are eligible for exchange only.
Damaged or defective items
If your order arrives defective, email a photo immediately to myholdal@holdalgroup.com and we will arrange a free replacement.
Our customer care team is available Monday–Friday, 8 AM–5 PM at myholdal@holdalgroup.com.
Payment Methods at MYHOLDAL
At MYHOLDAL, we provide convenient and secure payment options to enhance your shopping experience.
Pay for your order in cash when it is delivered to your doorstep. This method is straightforward and allows you to inspect your order before payment.
Prefer to pay by card? A secure payment link can be shared with you on request, once we have confirmed that all the items in your order are available in stock.
The payment is completed on the provider’s own secure page, so your card details are never shared with or stored by MYHOLDAL.
Questions about a payment?
Email myholdal@holdalgroup.com or call +961 1 489 289, Monday–Friday, 8 AM–5 PM.
Delivery Information
At MYHOLDAL, we strive to ensure that your orders are delivered quickly and efficiently.
Orders typically require 3 to 5 business days for delivery.
We ship exclusively within Lebanon.
Tracking or updating a delivery?
For any inquiries or updates regarding your delivery, email myholdal@holdalgroup.com or call +961 1 489 289, Monday–Friday, 8 AM–5 PM.
Customer Service
Our specialists are here to make your shopping experience effortless — from product advice and availability to order updates, returns and exchanges.
Opening hours
Monday to Friday, 8 AM – 5 PM.