This leave-in treatment cream deeply hydrates and soothes your scalp to help prevent flaking, itching, and irritation. This leave-in treatment cream deeply hydrates and soothes your scalp to help prevent flaking, itching, and irritation. Dubbed "the Meryl Streep of hair care" by Allure, Living Proof offers a diverse, award-winning collection of products that optimize the styling and health of your locks. Led by a team of world-renowned biomedical scientists and veteran stylists, the brand applies advanced technology to beauty challenges - and makes bad hair days a thing of the past.