Calcium metabolism is much affected by Vitamin C intake. Patients who suffer from calcium overload benefit from supplementing larger daily amounts of Vitamin C because they prevent calcium from calcifying soft tissue. Low stomach acid levels are also a common side effect of elevated calcium, for which a higher Vitamin C intake is beneficial as well. While the right amount of ascorbic acid increases bioavailability of calcium, very high intake of Vitamin C, if not needed, will eventually put extra demands on calcium stores and result in calcium deficiency, which can lead to osteopenia, or eventually osteoporosis... Full Text