Calcium Carbonate, Bulking Agents: Microcrystalline cellulose & Dibasic calcium phosphate, Potato Starch, Anti-Caking Agents: Magnesium Stearate, Vitamin D3 (Cholecalciferol). Calcium Carbonate 2400mg & Vitamin D3 800iu (cholecalciferol) vegetarian Tablets Manufactured in UK.