Calcium - urine

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Overview Risks Results

Calcium - urine

If a person is eating a normal diet, the expected amount of calcium in the urine is 100 to 300 mg/day. If eating a diet low in calcium, the amount of calcium in the urine will be 50 to 150mg/day.

Note: mg/day = milligrams per day

Abnormal results are indicated as follows:

Increased or inappropriately high levels of urine calcium may indicate:

• Idiopathic hypercalciuria
• Milk-alkali syndrome
• Hyperparathyroidism
• Renal tubular acidosis
• Sarcoidosis
• Vitamin D intoxication
• Renal failure
• Use of loop diuretics

Decreased levels of urine calcium may indicate:

• Hypoparathyroidism
• Malabsorption (inadequate absorption of nutrients from the intestinal tract) disorders
• Vitamin D deficiency
• Use of thiazide diuretics

The urinary calcium test may also be performed to detect secondary hyperparathyroidism.

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