Kerastase Chronologiste Youth Serum

Overnight Youth Serum by Kérastase is a night treatment that targets dryness, dullness, frizz, lack of volume, and thickness, aiming to improve hair health overnight.

• The description claims that using the product increases fiber diameter by +5% after one night.
• The description claims that using the product reduces frizz by 66%, increases shine by 32%, and enhances strength by 92% after one night.
• The description claims that the product contains Pro-Xylane™, known for its anti-aging action, and Ochrophyta Algae, described as the fastest-growing algae in the world.