Nutri-Supplement Split Ends Serum by Kérastase is a high-nutrition ultra-sealing split ends serum for dry hair with split ends. This split ends treatment contains anti-dryness polymers to seal dry ends, preventing the appearance of split ends. It also delivers a dose of essential nutrients that boost the formula’s ability to nourish and reinforce the hair. The extremely nourishing oil acts as an anti-dryness for split ends and has a translucent oily texture. Up to 4X more split ends prevention.Bottle made of 20% recycled glass. Instrumental test results after application of Split-Ends Serum.