Kérastase 2% PURE HYALURONIC ACID SERUM This product is specifically for blonde hair, I have dark hair so it didn't have the effect it should. I used the product 2 days so it is open, but it is literally full, the purchase date was January 2024. PRODUCT BENEFITS A translucent repairing hyaluronic acid serum for blonde hair & moisturizer for the scalp. The serum instantly hydrates the hair immediately after blonding service, while soothes the scalp & preserves scalp moisture barrier. The serum is most effective when applied to wet/towel dried hair to activate the hyaluronic acid ingredient. Instantly hydrates hair Helps repair surface damage in one use Soothes scalp & preserves scalp moisture barrier +43% shinier hair* Reduces breakage, +45% stronger hair** *vs unwashed hair **vs non-conditioned shampoo