Calcium with Creatinine, Urine
Flags excess urinary calcium, a leading driver of kidney stones and a clue to calcium metabolism disorders.
Consider this test if:
- A history of kidney stones, or recurrent stones you want to understand
- Elevated blood calcium or known parathyroid or thyroid issues being worked up
- Tracking urinary calcium while on calcium or vitamin D supplements
- Investigating bone disease such as osteomalacia or Paget disease
- Checking how a thiazide or loop diuretic is affecting calcium handling
- HSA/FSA eligible
- Results delivered to your dashboard · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
No fasting required. A random urine sample is sufficient for screening, though results reflect recent diet, so a calcium-heavy meal or supplement beforehand can raise the value. Calcium supplements and loop diuretics increase urinary calcium, while thiazide diuretics lower it; note any of these. If a 24-hour collection is recommended for fuller evaluation, follow the timed-collection instructions instead.
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What this test is for
This test measures calcium in a random urine sample and divides it by creatinine to correct for how dilute or concentrated the sample is, reported as a calcium-to-creatinine ratio. Urine is the body's main route for eliminating calcium, so high excretion (hypercalciuria) is one of the established risk factors for kidney stones and can point to hyperparathyroidism, vitamin D excess, sarcoidosis, Paget disease, or bone-destroying conditions. Low urinary calcium shows up with hypoparathyroidism, vitamin D deficiency, osteomalacia, or familial hypocalciuric hypercalcemia. The creatinine here is a normalizing reference, not a kidney-function measure; for that use the dedicated creatinine or ACR tests. A random sample is a practical screen, but a 24-hour urine collection is preferred when calcium excretion is being formally evaluated.
Biomarkers tested
Includes 3 biomarkers
- Specimen
- Urine
- Measures
- Mass concentration
- Specimen
- Urine
- Measures
- Ratio
Urine creatinine tracks a waste product muscle breaks down at a steady rate, which makes it the reference point for judging whether a urine sample is concentrated or diluted. Labs use it to normalize other urine markers, most importantly albumin, into a ratio (ACR) that actually reflects kidney filtering rather than how much water you drank that morning. On its own it is rarely the number you care about, but pair it with albumin and it becomes one of the earliest ways to catch kidney strain from diabetes, high blood pressure, or high-protein training loads before symptoms show up.
- Specimen
- Urine
- Measures
- Mass concentration
What you'll learn
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Insights that connect the dots. A clinician reads your whole picture, not one result in isolation, connecting family history, past results, and lifestyle into clear next steps.
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Your personalized action plan. Nutrition, supplements, and training in one clinician-reviewed protocol, updated as your results change.
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Track your trends. Upload results from any lab and see each biomarker trend over time, so you know what is working.
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Never miss a recheck. Mito tells you what is worth retesting and when, then reminds you so nothing slips.
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 Fast, dashboard-delivered results
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.
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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.
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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. It is never a profit on the test itself. Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9 per month, and any applicable lab order or draw fee is itemized before you pay.
Where do I get tested?
Choose an available partner lab at checkout. If your cart contains multiple blood tests, Mito helps consolidate the eligible tests at one lab when possible. At-home kits and scans follow the collection or appointment process shown on their product page.
Is this eligible for HSA/FSA?
Yes. Eligible tests can be paid for with an HSA or FSA card at checkout.
When will I get my results?
Your results appear in your Mito dashboard after the laboratory completes processing. A clinician then reviews them before your analysis and personalized action plan are finalized. Timing varies by test, and specialty assays and at-home kits may take longer.
Do I need a physician's order?
No. Mito provides the laboratory order when one is required, so you do not need to arrange a separate physician visit before purchasing.
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