Dive Brief: Rihanna on Thursday launched Fenty Hair, the celebrated musician’s fourth beauty category since introducing Fenty Beauty in 2017. The brand, which launched on the Fenty Beauty website Thursday, is comprised of nine hair care and styling products built around the concept of repair, and infused with a proprietary solution called Replenicore-5, consisting of gooseberry, jackfruit extract, hydrolyzed vegetable protein, green tea extract and amino acids. At launch, Fenty Hair includes...