The recommended daily amount (RDA) for adults is 700mg calcium (or just under three 200ml glasses of cow's milk). Growing children and teens, breastfeeding women and people with fragile bone ...
However, taking more than the recommended daily allowance (RDA) can lead to calcium overload, a condition known as hypercalcemia. The RDA for calcium for most adults is 1,000–1,200 milligrams ...
A calcium pill or two, later in the day ... The upper tolerable level is 1,000 milligrams (1,500 IU); the RDA is 30 IU. "There is no way to get an overdose from diet or fortified foods.