Mend to Be Damage Recovery Leave-In Treatment hydrates, nourishes and renews strands whiling helping to improve the appearance of split ends, resulting in hair that is smoother, more manageable, and healthier looking. The leave-in treatment is formulated with a high-performance Restorative Complex and enriched with biotin and castor oil. Biotin helps stimulate the production of keratin, an essential coenzyme that helps maintain healthy hair, while castor oil increases hair flexibility and help to strengthen hair. Additionally, shea butter moisturizes hair and nourishes the scalp and cupuaçu butter infuses moisture into strands to help boost hair manageability.