This is the combination of Calcium Carbonate and Vitamin D3, where Calcium is obtained from European eggshell source. Along with Calcium it contains small amounts of essential salts and minerals for bone development, including Magnesium, Phosphorus & Strontium. It is 100% natural, highly digestible (98%), more absorbable and environment-friendly form of Calcium. It enriches the organic matrix of bones by helping the fixation of Calcium and increases bone density. It also contains soluble transport proteins for maximum absorption compared with other Calcium sources. Its absorption rate is higher than that of Algae, Coral, or Rock-based Calcium.