Normal Values:

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

Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.

Note: mg/day = milligrams per day

What abnormal results mean:

High levels of urine calcium (above 300 mg/day) may be due to:

• Chronic kidney disease
• Leaking of urine from the kidneys, which causes calcium kidney stones
• Sarcoidosis
• Takiong too much calcium
• Too much production of parathyroid hormone by the parathyroid glands in the neck
• Use of water pills called loop diuretics
• Very highvitamin D levels

Low levels of urine calcium may be due to:

• Disorders in which the body does not absorb nutrients from food well
• Parathyroid glands in the neck do not produce enough parathyroid hormone (PTH)
• Use of a water pill called a thiazide diuretic
• Very low levels ofvitamin D