What's this test for?

This test is ideal if you're experiencing signs of dehydration or overhydration, unexplained fatigue, dizziness, or frequent urination. It helps evaluate how well your kidneys are concentrating urine and maintaining your body's fluid balance, which is especially important for athletes, people with kidney concerns, or anyone managing conditions that affect hydration. Many people use this test when they're worried about their water balance or want to understand unusual symptoms related to fluid intake.

What happens after I get my results?

You'll receive detailed doctor notes in simple language explaining what your urine concentration levels mean for your hydration status and kidney function. These notes include personalized recommendations like how much water to drink, whether to adjust electrolyte intake, or if you should follow up with a specialist. You'll also get the standard lab report and can track your osmolality levels over time using our trends feature to monitor how hydration changes or interventions are working.

What's included in this test?

This test measures urine osmolality, which evaluates how concentrated your urine is by counting the number of dissolved particles. This measurement reveals how well your kidneys are managing your body's water balance and can detect dehydration, overhydration, or kidney dysfunction. It's particularly valuable for understanding why you might be experiencing extreme thirst, frequent urination, or unexplained fatigue related to fluid imbalances.

How should I prepare for this test?

For the most accurate results, follow any specific instructions provided by your healthcare provider regarding fluid intake before the test. You may be asked to collect a urine sample at a specific time of day, often first thing in the morning when urine is most concentrated. Avoid excessive water intake immediately before collection, as this can dilute results and affect accuracy.

When will I get my results?

Most urine osmolality test results are typically available within 1-2 business days after your sample reaches the laboratory. You'll receive an email notification as soon as your results are ready to view in your secure online account, along with easy-to-understand doctor notes explaining what your levels mean.

Who should consider getting this test?

This test is valuable for athletes monitoring hydration during intense training, people with diabetes experiencing excessive thirst or urination, and anyone with suspected kidney problems. It's also useful for individuals on certain medications that affect fluid balance, people with symptoms of dehydration or overhydration, and those managing conditions like SIADH or diabetes insipidus.

What symptoms indicate I may need this test?

Consider this test if you're experiencing extreme thirst that doesn't go away with drinking water, urinating much more or less than usual, persistent fatigue or weakness, dizziness or confusion, or dark concentrated urine. Other signs include unexplained swelling, rapid weight changes, or feeling constantly dehydrated despite drinking plenty of fluids.

How can I naturally support healthy fluid balance?

Maintain proper hydration by drinking water consistently throughout the day rather than large amounts at once, and adjust intake based on activity level and climate. Include electrolyte-rich foods like bananas, leafy greens, and coconut water to support fluid balance. Monitor your urine color as a simple hydration indicator, aiming for pale yellow, and avoid excessive caffeine or alcohol which can affect hydration status.

What does high urine osmolality mean?

High urine osmolality means your urine is very concentrated, usually indicating dehydration or that your body is trying to conserve water. This can happen when you're not drinking enough fluids, losing excessive fluids through sweating or illness, or in some cases when hormones like ADH are elevated. It may also signal kidney problems or conditions affecting your body's ability to regulate fluid balance properly.

What does low urine osmolality mean?

Low urine osmolality means your urine is very dilute, which typically indicates overhydration or that your kidneys are releasing excess water. This can occur if you're drinking too much water, have diabetes insipidus, or are taking certain medications like diuretics. It may also suggest your kidneys aren't concentrating urine properly, which could indicate underlying kidney dysfunction or hormonal imbalances affecting fluid regulation.

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.

Urine Osmolality Test - Hydration & Kidney 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]

Urine Test for Hydration and Kidney Function

Osmolality, Urine

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

What's this test for?

How should I prepare for this test?

What's included in this test?

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

Urine Test for Hydration and Kidney Function

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

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