We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission Here’s our process.
Medical News Today only shows you brands and products that we stand behind.
Our team thoroughly researches and evaluates the recommendations we make on our site. To establish that the product manufacturers addressed safety and efficacy standards, we:- Evaluate ingredients and composition: Do they have the potential to cause harm?
- Fact-check all health claims: Do they align with the current body of scientific evidence?
- Assess the brand: Does it operate with integrity and adhere to industry best practices?
Kidney function tests determine whether the kidneys are functioning typically or whether a person may need regular testing or further treatment. Many online companies design these types of tests for home use, which can be beneficial for people who cannot visit a doctor’s office.
Quick links
- For collecting samples at home: LetsGetChecked Kidney Test
- For doctor-reviewed test requests: Pixel by Labcorp Kidney Health Test Package
- For a wide variety of tests: Walk-In Lab Kidney Test
Kidney function tests help diagnose and monitor kidney disease. The kidneys
The United Kingdom National Health Service (NHS) states that doctors may suggest testing for people who experience symptoms of chronic kidney disease. These symptoms include:
- lack of appetite
- unintentional weight loss
- shortness of breath
- tiredness
- frequent urination
- blood in the urine or really dark urine throughout the day
According to the
- diabetes
- high blood pressure
- heart disease
- a family history of kidney failure
Additionally, kidney function tests help diagnose kidney disorders in their early stages.
There are two types of kidney function tests: blood and urine tests.
Blood tests
Doctors may refer to this as a glomerular filtration rate (GFR) test, as it checks how well the kidneys filter waste from the blood.
According to the
| GFR of 60 or more | typical range |
|---|---|
| GFR of less than 60 | may indicate kidney disease |
| GFR of 15 or less | may indicate kidney failure |
If a test returns a GFR of 15 or less, a person may need a kidney transplant or dialysis.
Healthcare professionals may also measure the amount of creatine in the blood to estimate a person’s GFR. People experience higher levels of creatine when they have kidney disease.
Urine tests
Urine tests check for albumin, a protein that can end up in the urine following kidney damage.
According to the
People looking for an at-home kidney function test may wish to consider the following factors before making a purchase:
- Certified laboratories. Some companies work with laboratories with a
Clinical Laboratory Improvement Amendments (CLIA) certification. This indicates these facilities have obtained federal certifications to meet quality laboratory testing standards. - Consultations. Some companies offer consultations with a medical professional for people who wish to discuss their results.
- Collection kit. Individuals who order their home kit from an online provider should receive all the tools they need to take the blood sample. They should also receive instructions.
- Privacy. Companies compliant with the Health Insurance Portability and Accountability Act ensure that sufficient security measures are in place to protect the individual’s private and sensitive information. Additionally, many companies offering home testing use discreet packaging.
Several kidney function tests are available to purchase online. Some tests require a person to visit an affiliated laboratory to collect and test samples.
People need to interpret their kidney test results with the help of a healthcare professional. If the kidney test indicates a potential kidney condition, an individual should contact a doctor as soon as possible for further advice and treatment.
Please note that the writer of this article has not tried these products. All information presented is purely research-based and correct at the time of publication.
Medical News Today follows a strict product selection and vetting process. Learn more here.
For collecting samples at home: LetsGetChecked Kidney Test
LetsGetChecked offers a finger prick test that tests for urea, creatine, and estimated GFR.
The website features an instructional video explaining how people should collect the sample. LetsGetChecked also provides individuals with all the tools they need, such as a self-addressed envelope, blood collection tube, and wipes.
The company recommends a person take their sample before 10 a.m. on Monday to Thursday, and once they collect their sample, they can return it on the same day. LetsGetChecked also suggests avoiding protein-heavy meals before testing.
People should receive their results within 2–5 days and can discuss their results with LetsGetChecked’s nurses, who are available any time of the day.
The company states its laboratories are CLIA-approved and are part of the College of American Pathologists (CAP) program. LetsGetChecked also accepts Health Savings Accounts (HSA) and Flexible Savings Accounts (FSA) as payment options.
The test costs $99 as a one-off purchase.
Pros
- The LetsGetChecked nursing team is available at any time to discuss results.
- The company offers a subscription plan for those who require regular testing.
- A person does not have to visit a lab for testing or dropping off samples.
- The service accepts HSA and FSA as payment options.
Cons
- LetsGetChecked only provides one type of kidney test.
- A doctor may recommend the need for further testing if this test indicates a kidney condition.
- The test may not suit all budgets.
For doctor-reviewed test requests: Pixel by LabCorp Kidney Health Test Package
LabCorp’s kidney test is available for individuals aged 18 years and older. For the test, people need to provide a blood and urine sample.
According to LabCorp’s website, once customers buy a test, a physician reviews and approve their test request. Then, the individual visits one of the company’s testing centers, where a trained technician takes their sample.
People generally receive their results through their online accounts, and if they require prompt attention, the company may contact them by phone or mail.
In addition, LabCorp states it performs its tests in CAP-accredited and CLIA-certified labs. The company also accepts HSA and FSA as payment options.
This test costs $89.
Pros
- The company accepts HSA and FSA as payment options.
- Doctors review the customer’s test requests.
- The company may call a person if they need to discuss their results.
Cons
- A person cannot perform this test at home. Instead, they need to visit a Pixel by Labcorp facility to provide their samples.
- The test is not available for people under 18 years old.
- The test may not suit all budgets.
For a wide variety of tests: Walk-In Lab Kidney Tests
Walk-In Lab offers a range of kidney tests. People can choose between kidney function, renal function, or urinalysis screenings.
The company offers several at-home test kits as well as kidney tests that require a visit to a laboratory.
People can purchase a kidney test online and go to one of two affiliated laboratories to provide their samples. The technicians will then test the samples and return the results. Its affiliated labs are Labcorp and Quest.
However, the company states that Labcorp does not allow online lab testing for individuals residing in:
- Massachusetts
- Maryland
- New York
- New Jersey
- Rhode Island
Additionally, Walk-In Labs says that Quest does not allow online lab testing for those residing in:
- New York
- New Jersey
- Rhode Island
The company also states people generally receive their test results within 48 hours of sample collection, although some tests may take longer. Additionally, the service’s tests are eligible for Health Savings Cards, while Walk-In Labs claims it will price-match any cheaper tests.
Prices start from $22 depending on the test type and affiliated lab.
Pros
- The company accepts Health Savings Cards.
- There is a wide variety of tests available.
- The company offers to price-match any cheaper tests.
- People may receive their test results within 48 hours.
Cons
- Most of the Walk-In Lab’s kidney tests do not allow at-home sample collection.
- People from certain states are not able to use this service.
- A person will need to travel for an in-person test.
The table below compares the kidney tests listed in the section above:
| LetsGetChecked Kidney Test | Pixel by LabCorp Kidney Health Test Package | Walk-In Lab Kidney Tests | |
|---|---|---|---|
| Collection method | finger prick | blood and urine sample | depends on the test type |
| Delivery method | online | online, possible phone or mail follow-up | online |
| Time to receive results after submission | 5 days | not specified | usually within 24–48 hours, depending on the test type |
| Price | $99 | $89 | from $22 |
Below are some frequently asked questions about kidney tests.
What is the first sign of kidney failure?
Many people do not exhibit symptoms of kidney disease in the early stages. It is usually discovered with routine testing.
Symptoms are more likely yo present during later stages, such as during kidney failure.
According to the American Kidney Fund, some early symptoms of kidney failure include the following symptoms:
- muscle cramps
- difficulty sleeping
- nausea and vomiting
- itching
- swelling in the feet and ankles
Learn more about kidney disease.
When the kidneys suddenly stop working, a person can experience acute kidney failure, which can lead to:
- abdominal pain
- back pain
- fever
- diarrhea
- rash
- nosebleeds
Learn more about kidney failure.
People need to contact a doctor as soon as possible if they experience any symptoms of kidney failure.
Are at-home kidney function tests accurate?
There is currently no research on the accuracy of home kidney function tests.
The
If a person is unsure how accurate an at-home test is, they can speak with a healthcare professional about a test they are considering.
People with symptoms of kidney disease or those at high risk of developing kidney problems should consult with a doctor.
A healthcare professional may recommend further testing and treatment or refer them to a specialist doctor, such as a nephrologist, who has expertise in kidney diseases.
Home kidney function tests are tests that people can purchase to check their kidney’s condition. These can be helpful for individuals experiencing early symptoms of kidney disease or those at a high risk of developing the condition.
However, people need to interpret their results with the help of a healthcare professional. They should therefore contact a doctor for further advice and treatment if the test results indicate kidney disease. This is because healthcare professionals need to consider the symptoms and other factors before establishing a diagnosis based on a test alone.