The research has defined the new group as sophisticated, discerning young women and Hachette says that the relaunch will help this audience reconnect with the title.
The magazine, which hits newsstands this week, will have a new logo, new cover-look and a complete redesign. It will mix real-life stories, celebrity gossip and interviews with the usual women's glossy features on beauty, fashion and relationships.
The first redesigned issue, costing £1.90, comes complete with a free summer vest in a choice of three colours.
Frances Sheen, who moved from More! magazine in January to edit B, said: "The new B will be in tune with the positive mindset of a confident group of young women who live in an age where anyone can be who they want to be.
"We've spoken to so many of those readers who have never felt more confident with the opportunities they now have. It's a really exciting time for them and B reflects that excitement."
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