"Skingredients Skin Veg (£44) hydrating and brightening pre-serum is called 'Veg' because of the antioxidants," Rock said. "I truly believe they are the skin-care underdog . . . Hyaluronic acid earns your love immediately. Retinol is more appealing, because it's slightly daunting. And acids are instantaneous. Whereas antioxidants are like vegetables. We know we should have them. We don't see a difference immediately, but over a period of time, they do make you healthier."