21st Century Vitamin D3 5000 IU tablets provide a convenient, once daily option to help supplement vitamin d intake as part of a balanced wellness routine. Vitamin d3, also known as cholecalciferol, is naturally produced by the body through sunlight exposure and is found in limited food sources such as fatty fish and egg yolks. This high potency formula includes calcium and is designed for adults seeking an easy to swallow tablet that fits gluten free and non-gmo dietary preferences. Adults take one (1) tablet daily with any meal or as directed by a healthcare provider.