Adcal-D3 Lemon Chewable Tablets Adcal-D3 Lemon Chewable Tablets supplement your diet with extra calcium & vitamin D3 to support healthy bones & teeth. They are used in conditions where your body's calcium & vitamin D levels need to be increased, for example osteoporosis. Studies show that taking calcium & vitamin D3 over a long time can prevent hip & other non-vertebral bone fractures in later life.