The growth rate of the consumer healthcare business could accelerate now that an activist investor is involved.Shares of Kenvue (KVUE 0.92%) got a nice bounce on Monday, Oct. 21, thanks to Starboard Value. The activist investor recently pushed the stock up by announcing a stake in the consumer goods giant that's behind popular brands such as Tylenol and Listerine.Despite the recent bump, Kenvue stock has fallen by about 15% since it was spun off from Johnson & Johnson last May. The loss is extra upsetting b ...