Tresemme Biotin Repair Leave-In Cream Serum promotes less breakage* while protecting hair from external damage. Formulated with Biotin and Pro-Bond Plex, this salon-inspired hair treatment penetrates hair fibres and helps repair bonds with continuous use. Our hair serum visibly repairs 7 types of damage, leaving it up to 3x stronger and resulting in 98% less breakage. Our hair care experts are at the forefront of science and safety – every ingredient is carefully selected to ensure your hair receives the best possible care.