If you want to get your daily requirement for calcium in a form your body can actually use, we have a product you should check out: Country Life Target-Mins Calcium-Magnesium with Vitamin D. First off, this supplement provides your full daily value of Calcium from 5 different sources. This helps you get higher absorption and greater availability than just one form. One form that stands out is called Hydroxylapatite. This is a form of calcium makes up 70 percent of your bones. Supplementation with this form has been shown in studies to slow bone loss and increase bone density better than other forms.Beyond these forms of calcium, Magnesium and Vitamin D are also included to maximize calcium efficiency. Magnesium is necessary for calcium absorption and is critical in maintaining healthy bones. Vitamin D aids calcium absorption and is needed for bone growth. This Target-Mins formula also uses specific carriers to improve transportation of minerals. Make Target-Mins Calcium-Magnesium with Vitamin D your source of calcium.