What's this test for?

This test is ideal if you're experiencing recurring kidney stones or if you've been told you have calcium oxalate stones and want to understand why. It's also useful if you have a family history of kidney stone disease or unexplained kidney problems. The test measures how much oxalate your body is excreting, which can point to a dietary or metabolic cause behind stone formation.

What's included in this test?

This test measures oxalic acid (oxalate) in a 24-hour urine collection along with creatinine, which helps confirm the urine sample was collected correctly and completely. Measuring oxalate over a full day gives a more accurate picture than a single random urine sample because oxalate excretion can vary throughout the day. Together these two measurements help identify whether excess oxalate is contributing to kidney stone formation.

What happens after I get my results?

Your results will show up in your account with the normal range for oxalic acid clearly explained next to your value. If your levels are elevated, simple next steps include cutting back on high-oxalate foods like spinach, nuts, and chocolate, drinking more water, and retesting after making these changes to see if your levels improve. If your result is significantly high or you have ongoing symptoms like pain or blood in your urine, seek medical care promptly. You can download the full lab report anytime and track your oxalate levels over time using the trends feature.

How can I naturally support healthy oxalate levels?

Drinking plenty of water throughout the day helps flush oxalate out of your system and dilutes your urine, which lowers stone risk. Reducing high-oxalate foods such as spinach, beets, nuts, chocolate, and tea can also help, along with pairing calcium-rich foods with meals since calcium binds oxalate in the gut before it reaches your kidneys. Limiting excess vitamin C supplements is another simple step, since your body can convert extra vitamin C into oxalate.

When will I get my results?

Results from this 24-hour urine test are typically ready within about 7 days after the lab receives your completed collection. You'll get a notification once your results are posted to your account. Because the test requires a full day of urine collection, plan for that time plus lab processing before your report is ready.

Who should consider this test?

This test is a good option for anyone with recurring calcium oxalate kidney stones or a family history of stone disease. It's also worth considering if you have a digestive condition like inflammatory bowel disease or have had bowel surgery, since these can increase oxalate absorption. Children experiencing their first kidney stone may also benefit from this screening.

What symptoms indicate I may need this test?

Symptoms like sharp back or side pain, blood in your urine, or passing what feels like gravel or a stone are strong signs you might benefit from this test. Recurrent urinary tract infections combined with stone history can also be a clue. If you've had more than one kidney stone episode, checking your oxalate levels can help figure out why.

What does high oxalic acid mean?

A high result means your body is excreting more oxalate than usual, which raises your risk of forming calcium oxalate kidney stones. This can be caused by eating a lot of high-oxalate foods, poor fat absorption in your gut, dehydration, or in rare cases an inherited enzyme problem. Cutting back on high-oxalate foods, staying well hydrated, and retesting are good first steps.

What causes high oxalate levels?

Common causes include eating large amounts of oxalate-rich foods like spinach, nuts, rhubarb, and chocolate, taking high-dose vitamin C supplements, or having a digestive condition that causes fat malabsorption, such as Crohn's disease. Less commonly, a rare inherited condition called primary hyperoxaluria causes the body to overproduce oxalate on its own. Dehydration can also concentrate oxalate in urine and make levels look higher.

How often should I retest?

If you're making dietary changes to lower your oxalate levels, retesting after 2-3 months gives your body enough time to show a meaningful change. If you have a history of recurrent stones, annual testing can help you track whether your risk factors are staying under control. Your trends dashboard makes it easy to see how your levels change between tests.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp). Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

Oxalic Acid Urine Test - Kidney Stone Cause Check

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]

Oxalic Acid 24-Hour Urine Test with Creatinine

Oxalic Acid, 24-Hour Urine with Creatinine

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

What's this test for?

What's included in this test?

What happens after I get my results?

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

Find a lab near you

Oxalic Acid 24-Hour Urine Test with Creatinine

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

1,000,000+ blood tests later, here's what our customers say