What medical conditions incentive the body to lose abundantly of calcium?

Some people apparently require extra calcium to make up for losing a lot of it due to a medical condition. Which conditions incentive the body to lose a lot of calcium?
Answers:
Hypovitaminosis D, your body needs vitamin D to hold calcium. Without it, the calcium in your body will go to use or be wasted.
The most common ones are menopause and inactivity. So if you're a 60 year mature female couch potato, you're in trouble. Renal osteodystrophy is pretty common, too. Excluding renal end, other forms of hyperparathyroidism are somewhat less common.
The condition is called hypocalcemia and it has copious root causes and even more secondary and tertiary causes. Some of the adjectives root causes are:

Thyroid Dysfunction
Vitamin D Deficiency
Hypermagnesemia
Hypomagnesemia

Some of the common secondary and tertiary cause are:

Absent PTH (Parathyroid hormone)
Eating Disorders
Genetics
Age
Many illnesses and diseases
Renal (Kidney) problems
Women-Menstrual cycle related issues (menopause, peri-menopause, etc.) Source(s): Toxicologist
An adenoma on the parathyroid gland will produce the body to take calcium from the skeleton.

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