Solgar has developed a high potency formula combing calcium citrate with Vitamin D3. Calcium absorption requires Vitamin D, a fat-soluble vitamin, and by combining these in one formula, you are guaranteed to get great value from this supplement. Calcium is the mineral which is most present in our body and is stored mainly in our bones. It is required for strong and healthy bones, and teeth. As we age the absorption of calcium decreases, so there\'s even more reason that we should make sure we have enough calcium in our diet by eating dairy products such as milk, yogurt and cheese. Intake of adequate Calcium levels as part of a healthy diet, along with physical activity, may reduce the risk of health concerns connected with bones in later life. When we are not able to reach adequate levels of calcium through our diet, a supplement might be advisable. Solgar Calcium Citrate with Vitamin D3 product is available in a citrate form; a highly absorbable form of minerals compared to the more commonly available oxides and is therefore ideal for those with digestive issues. Vitamin D3 is a form of D that is easy for the body to use and assists the efficiency of calcium to be absorbed by the body. Known as the \"sunshine vitamin\" the benefits are numerous and well documented and have long been associated with optimal bone health. With 4 tablets a day, Solgar Calcium Citrate with Vitamin D3 Tablets, will contribute to: - Normal muscle function (calcium) - Maintenance of normal bones and teeth (calcium & Vitamin D) - Normal function of the immune system (Vitamin D) - Normal absorption of calcium and phosphorus (Vitamin D) - Normal blood calcium levels (Vitamin D) - Maintenance of normal muscle function (Vitamin D) All Solgar products meet our industry recognized \"Gold Standard\" for excellence. Made using naturally sourced ingredients and innovating since 1947, Solgar is your perfect supplement to good health - 98% of Solgar consumers recommend the brand