Calcium, 24-Hour Urine without Creatinine
Measures how much calcium your kidneys excrete in a full day, a key screen for kidney stone risk.
Consider this test if:
- Recurrent kidney stones or a first stone with calcium-containing composition
- Working up high blood calcium, suspected hyperparathyroidism, or another calcium metabolism disorder
- Investigating bone loss alongside parathyroid and vitamin D testing
- Distinguishing familial hypocalciuric hypercalcemia from primary hyperparathyroidism
- Checking whether dietary or medication changes are affecting calcium excretion
- HSA/FSA eligible
- Typical results in 1 day · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
Results are most meaningful after three days on a low-calcium, neutral-ash diet before and during collection. Where safe, drugs that affect mineral metabolism should be paused two to four weeks beforehand, including antacids, phosphates, diuretics, glucocorticoids, carbonic anhydrase inhibitors, and anticonvulsants; calcium supplements and loop diuretics raise urinary calcium, while thiazide diuretics lower it. Collection runs a full 24 hours: empty your bladder at the start and discard it, then collect every void including the final one at the same time the next day, using the acidified container provided. Record start and end times and total volume.
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What this test is for
This test measures the total amount of calcium your kidneys excrete over a complete 24-hour period, reported in milligrams per day. High urinary calcium (hypercalciuria) is one of the established risk factors for kidney stones and also shows up in hyperparathyroidism, vitamin D excess, sarcoidosis, Paget disease, and bone-destroying conditions such as multiple myeloma. Low urinary calcium points toward hypoparathyroidism, vitamin D deficiency, osteomalacia, or familial hypocalciuric hypercalcemia. Because excretion reflects diet, intestinal absorption, bone turnover, and kidney handling all at once, a timed 24-hour collection is far more meaningful than a random spot sample.
This is the version without creatinine, reporting calcium as mass per 24 hours. The companion Calcium with Creatinine version adds a creatinine measurement to confirm the collection was complete, and serum calcium tests measure blood levels for a different question; this urine test is about how much calcium is actually leaving the body.
What to expect
- 1 Book instantly
Click, book, done. Choose a convenient lab location near you. Transparent, up-front pricing.
- 2 Quick lab visit
Testing to fit your busy schedule, usually 15 minutes or less. Walk-in and appointments available.
- 3 Typical results in 1 day
Your results post straight to your dashboard as soon as the lab completes them.
- 4 Expert guidance
Included with Mito membership. A clinician reviews your results and your personalized action plan follows, with clear next steps.
Everything your health needs,
in one membership
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Every test at our cost
Members pay our cost on every test, with lab fees passed straight through. The full receipt is itemized, never padded.
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Continuous tracking, all in one place
Upload past labs and watch your trends over time. Every marker and visit lives in one longitudinal record, so all your care stays together.
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Year-round clinician support
Text anytime and get clinician-reviewed answers. When you want to go deeper, 1:1 consultations are available at affordable rates.
All for $9/month
Order any test or consult without joining. For $9/month, members unlock member prices, trend tracking, and year-round clinician guidance.
Mito Membership
$9 /mo
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Without membership
$0
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Frequently asked questions
View all FAQsHow does pricing work?
Every test shows the member price next to the standard non-member price, so you can see what membership saves you. The member price is our cost — covering the lab and what it takes to run the service — never a profit on the test itself; Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9/mo, and you still pay the lab’s order fee. Prices are itemized before you pay, with no hidden fees.
Where do I get tested?
Choose a partner lab (Quest, Labcorp, or BioReference) at checkout. If your cart spans multiple tests, we consolidate the whole order onto a single lab so you only make one visit.
Is this eligible for HSA/FSA?
Yes. This test is HSA/FSA eligible, and you can pay with your HSA/FSA card at checkout.
When will I get my results?
Your results post to your dashboard once your lab completes them, then a clinician reviews them and your full analysis and personalized action plan (with clear next steps) follow. Turnaround varies by test: specialty assays and at-home kits take longer, and each test shows its expected turnaround before you buy.
Do I need a doctor’s order?
No. Mito provides the lab order for you, so you can book and get tested without a separate doctor visit.
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