This conditioner hydrates, strengthens, and adds serious shine to give dull, dry strands an instant shot of vitality with every wash. This conditioner hydrates, strengthens, and adds serious shine to give dull, dry strands an instant shot of vitality with every wash. 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.