EXTRA White Lemon Lime Chewing Gum. EXTRA® Sugarfree Chewing Gum helps to keep teeth clean and healthy, enabling you to feel more confident and ready to make the most of everyday moments and have your Time to Shine™. Chewing EXTRA® White helps to reduce stains before they build up to make sure that every smile is an EXTRA® White one. Wrigley's EXTRA® White Lemon Lime Sugar free Chewing Gum. Juicy EXTRA® Lemon Lime flavour. Endorsed by the FDI World Dental Federation.