Calcium supplements are important to bone health and may be related to reduced rates of colon cancer. Women need to be particularly careful about ensuring an adequate calcium intake. After menopause bone loss accelerates and can result in serious bone condition known as osteoporosis. Even if you take special care to eat foods high in calcium such as dairy products and sardines, a lack of exercise, use of antacids and drinking caffeinated beverages can reduce your absorption of this mineral.