What's this test for?

This test is ideal if you're experiencing high blood pressure that's hard to control, especially with several medications. It helps identify a hidden hormone imbalance called Primary Aldosteronism, which is a common but often missed cause of stubborn high blood pressure. Catching it early can help protect your heart, kidneys, and metabolism from long-term damage.

What happens after I get my results?

Your results will show up in your account with each value explained alongside its normal range, so you can see exactly where you stand. If your renin level comes back low, the lab automatically runs an aldosterone test on the same sample to give you a complete picture without needing a second draw. Depending on what your numbers show, next steps might include lifestyle changes like reducing salt intake, retesting in a few months, or seeking prompt medical care if your blood pressure readings are dangerously high. You can download a standard lab report anytime and track your results over time using the trends feature.

What is renin and why does it matter?

Renin is a hormone your kidneys release to help control your blood pressure and fluid balance. When renin is too low, it can signal that your body is producing too much aldosterone, a hormone that makes you retain salt and water, which drives blood pressure up. Understanding this balance helps explain why some cases of high blood pressure don't respond well to typical treatments.

How can I naturally support healthy blood pressure?

Cutting back on salty, processed foods can make a real difference since excess sodium makes aldosterone-related blood pressure issues worse. Regular exercise, maintaining a healthy weight, and limiting alcohol also help your body regulate fluid balance more effectively. Eating potassium-rich foods like bananas, spinach, and avocados can help counterbalance sodium's effects, though you should still track your blood pressure regularly.

When will I get my results?

Results are typically ready within about 7 days of your blood draw. If your renin level triggers the automatic aldosterone follow-up test, that may add a little extra processing time since it's run on the same sample. You'll get a notification as soon as everything is ready to view in your account.

Who should consider this test?

This test is a good fit for anyone with high blood pressure that's difficult to control despite taking multiple medications. It's also worth considering if you have low potassium levels along with high blood pressure, or if high blood pressure runs in your family and started at a young age. People with high blood pressure and sleep apnea may also benefit from checking for this hidden hormone cause.

What symptoms indicate I may need this test?

Signs that this test may be worth considering include blood pressure that stays high despite taking three or more medications, frequent muscle cramps or weakness, and excessive thirst or urination. Some people also notice fatigue or heart palpitations. These symptoms can point to an aldosterone imbalance rather than typical high blood pressure.

What does a low renin result mean?

A low renin level suggests your kidneys are producing less of this hormone than expected, which can happen when your body is already retaining too much salt and water. This pattern often triggers the automatic aldosterone follow-up test to check whether an overactive adrenal gland is the underlying cause. It's a useful clue, not a diagnosis on its own, so the aldosterone result and your symptoms together give a clearer picture.

What causes abnormal renin or aldosterone levels?

Low renin combined with high aldosterone is often caused by a small growth on one or both adrenal glands, or by the adrenal glands simply being overactive. Certain blood pressure medications, a high-salt diet, and kidney conditions can also affect these levels. Age and hormonal changes can play a role as well.

How often should I retest?

If your initial results are normal, retesting once a year alongside routine blood pressure checks is generally reasonable. If your results were abnormal or borderline, retesting in 3 to 6 months can help confirm the pattern and track whether lifestyle changes are making a difference. Anyone starting new blood pressure medication should also consider retesting since some drugs can affect renin and aldosterone levels.

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.

Renin & Aldosterone Test - High Blood Pressure Screening

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]

Plasma Renin Activity Test with Aldosterone Reflex

Plasma Renin Activity with Reflex to Aldosterone

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 happens after I get my results?

What is renin and why does it matter?

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

Find a lab near you

Plasma Renin Activity Test with Aldosterone Reflex

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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