Why Private MD Labs?
90-day money-back guarantee Lab order in minutes Save a trip to the doctor Low prices since 2005 Labs within 2 miles
Sample image
Sample report
BUN test for kidney health, dehydration detection, and overall wellness monitoring

Blood Test for Kidney Function and Dehydration

Urea Nitrogen (BUN)

Google
3,138 reviews
  • Reveal kidney function issues effortlessly
  • Pinpoint dehydration causes accurately
  • Assess overall health with precision
First results as soon as overnight*

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

What's this test for?

This test is ideal if you're experiencing signs of kidney problems like frequent urination, swelling in your legs or ankles, fatigue, or changes in urine appearance. It also helps identify dehydration issues and can reveal how well your kidneys are filtering waste from your blood. Many people use this test when they have symptoms that might point to kidney concerns or as part of monitoring overall health and hydration status.

How should I prepare for this test?

No special preparation is typically required for a BUN test, though your healthcare provider may ask you to avoid excessive protein intake for 24 hours before testing. Stay normally hydrated unless instructed otherwise, as dehydration can affect results. If you're taking any medications or supplements, let your provider know, as some can influence BUN levels.

What's included in this test?

Urea Nitrogen (Bun)

This test measures the amount of urea nitrogen in your blood, which is a waste product created when your body breaks down protein. BUN levels help assess how well your kidneys are filtering waste, reveal dehydration or overhydration issues, and can indicate problems with kidney function or urinary blockages. It's a simple but powerful marker that provides insight into your kidney health and overall metabolic balance.

What happens after I get my results?
You'll receive doctor notes in simple language explaining what your BUN level means for your kidney function, hydration status, and overall health. The notes include personalized recommendations like dietary adjustments, hydration tips, or whether you should monitor specific symptoms more closely. You'll also get the standard lab report and can track your BUN levels over time using our trends feature to see how lifestyle changes or treatments are working.
When will I get my results?
Most BUN test results are available within 1-2 business days after your blood sample is processed by the lab. You'll receive an email notification when your results are ready to view in your secure online account. If results show concerning values, you may be contacted sooner for follow-up recommendations.
Who should consider getting this test?
This test is valuable for anyone experiencing symptoms of kidney problems like fatigue, swelling, or changes in urination patterns. It's also important for people with diabetes, high blood pressure, heart disease, or a family history of kidney issues. Those monitoring existing kidney conditions, taking medications that affect kidney function, or experiencing severe dehydration should also consider this test.
What symptoms indicate I may need this test?
Common symptoms include frequent urination, especially at night, swelling in your hands, feet, or ankles, persistent fatigue or weakness, and changes in urine color or appearance. You might also notice decreased urine output, difficulty concentrating, nausea, loss of appetite, or feeling unusually thirsty. If you're experiencing severe dehydration symptoms or have risk factors like diabetes or high blood pressure, this test can provide important insights.
How can I naturally support my kidney health?
Staying well-hydrated by drinking plenty of water throughout the day is essential for kidney health. Reduce sodium intake by limiting processed foods and adding fresh herbs instead of salt for flavor. Exercise regularly, maintain a healthy weight, limit alcohol consumption, and avoid overusing pain medications like ibuprofen. Including kidney-friendly foods like berries, fish, and leafy greens can also help support optimal function.
What is BUN and why does it matter?
BUN stands for Blood Urea Nitrogen, which measures the amount of nitrogen in your blood that comes from urea, a waste product of protein breakdown. Your kidneys filter urea from your blood and eliminate it through urine. When BUN levels are abnormal, it can indicate that your kidneys aren't working efficiently, you're dehydrated, or there's a blockage in your urinary system. It's a key marker for assessing kidney function and overall metabolic health.
What does high BUN mean?
High BUN levels can indicate that your kidneys aren't filtering waste properly, you're dehydrated, or there's a blockage in your urinary tract. It can also result from eating a high-protein diet, taking certain medications, or conditions like heart failure or internal bleeding. While temporary elevations can happen with dehydration or dietary changes, persistently high BUN should be evaluated by a healthcare provider to rule out kidney disease or other underlying issues.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email [email protected] 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 [email protected], and we'll gladly help you. We've got your back and reply quickly.
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 [email protected]. 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 [email protected].
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 [email protected].

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 [email protected] and we'll gladly help you.

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

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
Blood Urea Nitrogen (BUN) 24 mg/dL
Demo results
Low Optimal 7 - 20 High
24 mg/dL

What this means

Your BUN level is slightly elevated, which may indicate mild dehydration or that your kidneys are working harder than ideal to filter waste. This could also be related to a high-protein diet or certain medications. While not necessarily concerning on its own, it's worth monitoring and addressing potential causes.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Blood Test for Kidney Function and Dehydration

Google
3,138 reviews
  • Reveal kidney function issues effortlessly
  • Pinpoint dehydration causes accurately
  • Assess overall health with precision

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

Google reviews 3138 reviews Next
Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.