Calcium, 24 Hours Urine Test
About Calcium, 24 Hours Urine Test
| Field | Value |
|---|---|
| Also Known As | 24-Hour Urine Calcium, Urinary Calcium Excretion Test, Urine Ca²⁺ 24H, Calcium 24H Urine, Urinary Ca+2 |
| Sample Type | 24-hour urine collection |
| Fasting Required | No; maintain your normal diet unless your doctor advises otherwise |
| Report Time | 1 to 3 business days |
| Recommended For | Adults of all genders; children with specific conditions |
| Price | Starting at ₹250 |
What Is a Calcium, 24 Hours Urine Test?
The calcium, 24 Hours urine test measures how much calcium your kidneys excrete in a full day. Doctors use it to understand how your body is handling calcium, and it is typically ordered when kidney stones, bone disorders, or parathyroid problems are suspected.
The test collects all urine passed over a 24-hour period and is also referred to as the 24-hour urine calcium test, urinary calcium excretion test, or urine Ca²⁺ 24H.
What Does a Calcium, 24 Hours Urine Test Measure?
The calcium in urine test evaluates two closely related aspects of calcium handling in the body. Here is what the test looks at:
| Component | What It Reflects |
|---|---|
| Total calcium excreted in urine (mg/day) | The amount of calcium your kidneys filter and release over 24 hours |
| Urinary calcium excretion pattern | An indicator of how well your intestines absorb calcium and how effectively your bones reabsorb it |
Together, these measurements give your doctor a picture of your calcium balance, which is important because calcium supports bone strength, heart function, muscle contraction, nerve signalling, and blood clotting.
Why Is a Calcium, 24 Hours Urine Test Done?
Doctors order this test when they need to assess calcium metabolism, investigate recurring kidney stones, or monitor certain long-term conditions.
Common Symptoms That May Require This Test
Your doctor may recommend a urine calcium test if you experience any of the following:
- Back pain or flank pain, especially if kidney stones are suspected
- Blood in the urine
- Abdominal pain or frequent urination
- Nausea
- Bone pain or unexplained fractures
- Muscle cramps or persistent fatigue
Conditions This Test Can Help Detect
The urinary calcium excretion test can help identify a range of conditions, including:
- Kidney stone risk, particularly stones made of calcium oxalate or calcium phosphate
- Osteoporosis and osteomalacia (softening of the bones)
- Hyperparathyroidism (overactive parathyroid glands producing excess hormone)
- Hypoparathyroidism (underactive parathyroid glands)
- Familial hypocalciuric hypercalcaemia, a genetic condition causing low urine calcium alongside mildly raised blood calcium
- Hypercalciuria, where the kidneys excrete too much calcium, a key risk factor for kidney stones and reduced bone density
Calcium, 24 Hours Urine Test for Chronic Disease Monitoring
This test is repeated regularly to track how well treatment is working for conditions such as hypercalciuria and recurrent kidney stones. For example, certain medications used to reduce calcium in urine can be monitored through repeat collections, typically every 3 to 12 months during active treatment. Your doctor will decide how often you need this test based on your condition.
How to Prepare and What to Expect
Preparation for the calcium 24 hour urine test is straightforward, but a few steps will help ensure your results are accurate.
Do You Need to Fast?
No fasting is required. You should follow your usual diet throughout the collection period unless your doctor tells you otherwise.
Practical Tips Before Your Test
Keeping these points in mind before and during the collection will help produce reliable results:
- Follow a low-sodium, moderate-protein diet for at least three days before the test, if possible, as high salt and animal protein intake can raise urine calcium levels
- Stop calcium and vitamin D supplements at least 48 hours before the test
- Avoid alcohol, caffeine, and nicotine during the 24-hour collection period
- Do not use laxatives during the collection period
- Tell your doctor about all medications you are taking, particularly diuretics, steroids, antacids, anticonvulsants, and carbonic anhydrase inhibitors, as these may need to be paused before the test
- Keep the urine collection container refrigerated or on ice throughout the 24 hours
Step-by-Step Procedure
The collection process is simple and takes place at home. Here is how it works:
- On the morning of day 1, urinate into the toilet as usual and discard this first sample. Note the exact time.
- From this point, collect every urine sample passed over the next 24 hours into the special container provided.
- On the morning of day 2, collect your first urine of the day into the container. This completes the 24-hour collection.
- Keep the container capped and refrigerated (or on ice) throughout the collection period.
- Label the container clearly with your name, collection start time, and finish time.
- Return the container to the collection centre or hand it to the home collection team as instructed.
Factors That Can Affect Accuracy
Several factors can influence your urinary Ca+2 test results. Be sure to inform your doctor if any of these apply:
- Taking diuretics (thiazide diuretics lower urine calcium; loop diuretics raise it)
- Use of lithium, glucocorticoids, vitamin D analogues, or acetazolamide
- Low fluid intake or heavy sweating during the collection period, which can concentrate the urine sample
- Diet high in sodium or animal protein
- Recent alcohol consumption
Understanding Your Calcium, 24 Hours Urine Test Results
Results from this test are best reviewed alongside your overall health history. The table below shows the general reference ranges used to interpret the calcium, 24 HR, urine test.
| Condition | Normal Range | Unit |
|---|---|---|
| Normal diet | 100 to 300 mg/day | mg/24 hours |
| Low calcium diet | 50 to 150 mg/day | mg/24 hours |
| Kidney stone risk threshold (males) | less than 250 mg/day | mg/24 hours |
| Kidney stone risk threshold (females) | less than 200 mg/day | mg/24 hours |
| Children | less than 4 mg/kg/day | mg/kg/24 hours |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain situations can shift results outside the typical range without indicating disease:
- Children, older adults, and pregnant individuals process calcium differently, so age- and condition-specific reference values apply
- Acute alcohol consumption can cause a sharp temporary drop in calcium-regulating hormone levels, leading to raised urine calcium output
- A diet high in sodium or animal protein can independently increase the amount of calcium the kidneys excrete, which may be misread as a metabolic abnormality
- Medications such as thiazide diuretics, loop diuretics, lithium, and glucocorticoids all influence urine calcium independently of any underlying condition
How to Maintain Healthy Levels
These general wellness habits support balanced calcium excretion:
- Drink 2 to 3 litres of water daily to keep urine diluted and reduce kidney stone risk
- Keep sodium intake moderate and limit excess animal protein, both of which can increase calcium loss through the urine
- Follow a balanced diet that includes adequate calcium from food sources, as very low calcium intake can paradoxically worsen stone risk through other mechanisms
Lupin Diagnostics Calcium, 24 Hours Urine Test Price and Home Collection
The calcium 24 hour urine test price at Lupin Diagnostics starts at ₹250, and home collection is available across cities in India. The table below shows approximate prices by location.
| City | Approximate Price (₹) |
|---|---|
| Chennai | ₹250 |
| Mumbai | ₹260 |
| Bangalore | ₹250 |
| Hyderabad | ₹250 |
| Kolkata | ₹260 |
| Pune | ₹260 |
| Indore | ₹250 |
| Bhopal | ₹250 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
If you're looking for 'calcium 24 hour urine test near me', booking it is quick and easy. Here is how:
- Select the test on the Lupin Diagnostics website
- Choose your city and preferred time slot
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre
- Receive your report via email or WhatsApp within the stipulated turnaround time
Home Collection
A trained phlebotomist can visit your home to deliver the collection container and guide you through the process. All samples are processed in NABL-accredited laboratories, ensuring accurate and reliable results. Your digital report is shared via email or WhatsApp once ready.
Frequently Asked Questions
The 24-hour urine calcium test measures how much calcium your kidneys release into the urine over a full day. It helps doctors assess kidney stone risk, check for parathyroid disorders, and evaluate conditions that affect bone and calcium balance.
Start by discarding your first morning urine on day 1. Collect all urine passed after that into the container provided. On the morning of day 2, add your first urine to the container, then cap it, label it, and return it as instructed. Keep the container refrigerated throughout.
Several medications can affect urine calcium levels, including diuretics, calcium supplements, vitamin D supplements, steroids, and certain anticonvulsants. Let your doctor know about everything you are taking, as they will advise you on what to pause and for how long.
Yes. Diets high in sodium or animal protein can raise the amount of calcium excreted in urine, potentially affecting your result. A low-sodium, moderate-protein diet in the days before the test, along with stopping calcium supplements, helps produce more accurate readings.
Elevated urinary calcium excretion (hypercalciuria) is a common risk factor for kidney stones and can also be associated with reduced bone density. It may also point to conditions such as hyperparathyroidism, excess vitamin D, or certain hormonal disorders. Your doctor will interpret the result in the context of your full health picture.
If you are being monitored for hypercalciuria, kidney stones, or a bone condition, your doctor will typically recommend repeating the calcium, 24 hours urine test every 3 to 12 months, depending on your treatment plan and how your condition is responding.
Yes. The calcium in urine test involves only urine collection over 24 hours. There is no needle, no blood draw, and no known risk associated with the test. It is entirely painless and can be done from the comfort of your home.
Calcium, 24 Hours Urine Test
