Expert Dr James Goolnik, founder of Optimal Dental Health, London, says: “Want one simple habit for a healthier smile? Chewing sugar-free gum with xylitol, after meals, is scientifically proven to reduce cavities, neutralise harmful acids, and keep your breath fresh – and my go-to gum is Peppersmith Gum. Why xylitol? It’s a natural sugar alternative that bacteria cannot digest, meaning it actively fights against tooth decay. It stops bacteria from sticking to your teeth, lowering plaque build-up and reducing the risk of cavities and bad breath. Xylitol also helps to neutralise acid and strengthen enamel. Every time you eat, acids…