Heidi Klum is known for her cutting-edge style and trademark tresses. Now, Unilever is tapping the sophisticated fashion icon to help launch its new Clear Scalp & Hair Beauty, Therapy, a line of nourishing shampoos and conditioners that turns the conventional hair care discussion on its head. This new approach “feeds scalp,” not just the ends, and gives women stronger, more beautiful hair in just seven days, according to the company. The products are infused with a break...