Medical Test Overview and What It Means for You

What is this test? This is a medical test or procedure that may involve a blood sample, urine sample, imaging scan, or other clinical exam, depending on the specific test ordered. It gives your care team information that is not visible during a routine visit.

The 24-hour stool calcium test measures the total amount of calcium that your body excretes in feces over a 24-hour period. Calcium is an essential mineral important for bone health, nerve function, and muscle contraction. This test helps doctors understand how well your body is absorbing and processing calcium from your diet.

Why is this test performed? Your clinician may order this test to check a general health issue, evaluate symptoms such as pain, fatigue, bleeding, or changes in body function, monitor a known condition, or track how well a treatment is working. It helps guide next steps.

Your doctor may order this test to evaluate digestive conditions that affect calcium absorption, such as Crohn's disease, celiac disease, or chronic diarrhea. It is also used to assess nutritional status and to help determine the cause of abnormal blood calcium levels or bone disorders.

How is the test done? The exact process depends on the test. Blood tests usually involve cleaning the skin and drawing a small sample with a needle. Imaging may involve lying still while pictures are taken, and urine or stool tests may require collecting a sample at home or in the clinic.

You will receive a special container for collecting all stool samples over a 24-hour period. It is important to collect every stool during this time and to keep the container refrigerated or on ice. Label the container with your name, date, and time of collection. After 24 hours, return the complete sample to your healthcare provider or laboratory as instructed.

What do the results mean? A normal result often means the measured value or finding is within the expected range. An abnormal result does not always indicate disease; it may reflect timing, medications, diet, activity, or other factors. Your clinician can explain whether treatment or repeat testing is needed.

High levels of calcium in stool (greater than 200 mg/24 hours in adults) may indicate conditions that cause malabsorption, such as celiac disease, Crohn's disease, or chronic pancreatitis. Low levels may suggest that you are not consuming enough calcium in your diet or that your intestines are absorbing calcium normally.