The small but mighty kidneys are efficient waste removers.
The main function of the kidney is to filter the blood to remove waste products of metabolism and transform this waste into urine. The kidneys are also essential for maintaining the correct salt and water balance in the body, and Important hormones are secreted from the kidney, including renin (controls blood pressure), and erythropoeitin (increases production of red blood cells). The kidneys are also responsible for the activation of vitamin D.
Reduced kidney function results in a buildup of toxins in the body, and can eventually lead to a multitude of symptoms, including muscle cramps, nausea, swollen feet, puffy eyes, lower back pain, high blood pressure, and blood in the urine.
Why consider this test?
90% of those with reduced kidney function or kidney damage do not show any symptoms and are unaware they have kidney disease.- Kidney disease is an under-recognized public health crisis, affecting around 15% of the adult population in the U.S.
- Kidney disease was the 8th leading cause of death in the U.S. in 2019
- Early diagnosis and treatment of reduced kidney function can slow or stop the progression of kidney disease.
What increases your risk of kidney disease?
Diabetes
High blood pressure
Family history
Over age 60
African American, Hispanic, Native American, or Asian ethnicity
Acute injury
What’s included in the Complete Kidney Health Test?

Urea Nitrogen
Urea nitrogen is a waste product from the breakdown of proteins within the body. It is usually removed from the body by the kidneys.
Kidney damage and reduced kidney function inhibit the removal of urea nitrogen from the blood and result in high blood urea nitrogen levels. Various other factors can also result in elevated blood urea nitrogen, including dehydration, urinary tract obstruction, congestive heart failure, shock and stress, severe burns, and gastrointestinal bleeding.
Reduced urea nitrogen in the blood is rare, but may indicate liver disease, malnutrition or overhydration. However, additional tests will be required to determine the cause of a low blood urea nitrogen result.

Creatinine and eGFR
Creatinine is a waste product from the breakdown of a compound called creatine. Creatinine is usually removed from the body by the kidneys. Estimated glomerular filtration rate (eGFR) is calculated from creatinine levels, age, body size and gender, and is a measure of kidney function.
Kidney damage and reduced kidney function inhibit the removal of creatinine from the blood and result in high creatinine levels and low eGFR levels. Various other factors can also result in elevated blood creatinine, including dehydration, kidney obstruction, increased protein intake, and intense exercise.
Reduced creatinine in the blood can be a sign of a muscle disease (e.g. muscular dystrophy), liver disease, or excess water loss. Low creatinine levels can also occur during pregnancy, in individuals who have a low muscle mass, or due to certain medications.
How It Works
Step 1. Order your test.
Choose the test that matches your need from our large array of tests. The kit will be delivered to your doorstep. There is no need to leave the comfort of your home.
Step 2. Collect your sample.
Collect your sample using the included instructions. Return your sample using the prepaid, pre-addressed packaging provided.
Step 3. Access your results online
Your sample will be tested as soon as it arrives at our lab. Access your results securely online via TherizonConnect.

Use TherizonConnect to view your test results quickly and easily
The results are only available through TherizonConnect, a free, secure patient portal that you can access on your smartphone, tablet, or desktop. You can also share your results with your doctor, family, or friends.
Kidney Health FAQs
Here are the answers to the most frequently asked questions about this test. Please feel free to contact us if you have any other questions.
Are there medical professionals involved in the process?
All of our tests are developed with advice and input from medical professionals.
Will I receive any guidance with my results?
All result reports will include brief and easy to understand interpretations of each of the biomarkers tested. Background information is also available, but we recommend that you share your test results with your healthcare provider to obtain the most benefit from your test results.
How does the Complete Kidney Health Test work?
Self-collect your sample following the detailed instructions included in the kit. Place your sample in the specimen bag provided and mail it back to the lab using the prepaid envelope inside the kit.
Our lab uses verified and approved clinical chemistry assays to accurately measure your blood urea nitrogen and creatinine levels, and estimate your glomerular filtration rate (eGFR). Your results are available through our online portal as soon as testing is complete.
What are my options if I have abnormal results?
It is important to share any abnormal results with you healthcare provider, as they can take into consideration your medical history, any previous test results, physical examinations, and other factors to determine the best treatment option.
What are normal urea nitrogen, creatinine, and eGFR levels?
Urea nitrogen levels vary by age and gender. Children tend to have lower urea nitrogen levels (5.1 – 16.8 mg/dL) with levels increasing in the teenage years (8.4 – 21 mg/dL). Adult females have levels between 7.0 and 20.1, while adult males have levels between 8.4 and 25.7 mg/dL.
Creatinine levels vary depending on age, ethnicity, body size and muscle mass. Normal creatinine ranges are 0.72 – 1.25 mg/dL for adult males and 0.57 – 1.11 mg/dL for adult females.
Normal GFR is more than 90 for adults. GFR declines with age, even in the absence of kidney disease. Values between 60 and 89 may indicate kidney disease. Values less than 60 for more than 3 months occur during moderate-to-severe chronic kidney disease.
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