If you’re sexually active, regular testing for sexually transmitted diseases (STDs) and infections (STIs) is crucial to protect your health and the health of your partners. While you can get tested at ...

A complement blood test measures how well complement proteins in your blood support immune defense. The complement system helps antibodies fight germs and clear foreign substances. Complement testing ...

Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

The glomerular filtration rate (GFR) is a measure of how well your kidneys are removing waste from your blood, which can be determined using an estimated GFR (eGFR) test. The test gets its name from ...

Jay N. Yepuri, MD, MS, FACG, is a board-certified gastroenterologist and member of the Digestive Health Associates of Texas Board of Directors and Executive Committee. A liver function test checks how ...

You might need it to check your levels of calcium, an essential mineral you need to be healthy. This often routine procedure helps screen you for conditions and diseases that may affect your bones, ...