You can be severely deficient in calcium and dangerously osteoporotic with normal calcium blood levels. Ensuring adequate dietary calcium then becomes of utmost importance.

Separately, for the past 20 years at least, my blood tests have shown a high level of calcium in my blood. I understand that the normal range for blood calcium is 8.5-10.3 mg/dL.

Hyperthyroidism can cause high levels of thyroid hormone in the body. In some cases, people with high levels of thyroid hormone may have higher calcium levels. Learn more.

My hepatologist wants me to take a calcium supplement, even though my calcium level has always been normal. I have always been overweight and led a very sedentary way of life. I had vitamin D ...