Users can upload past blood test results to see how their habits and behaviours are affecting their biomarkers.

Brad Reisfeld is a professor of chemical and biological engineering, biomedical engineering, and public health at Colorado State University. Your blood serves numerous roles to maintain your health.

A stress test measures how well your heart works when put under stress. It is ordered to assess exercise tolerance, see if your heart can respond to demands, or test if heart medications are working.

Mark Gurarie is a writer covering health topics, technology, music, books, and culture. He also teaches health science and research writing at George Washington University's School of Medical and ...

The hepatitis B surface antibody test (HBsAb) detects antibodies in the blood to determine if someone is immune to the hepatitis B virus (HBV). A negative or nonreactive result means the individual is ...

After a recent COVID-19 exposure, Dr. Christina Astley tested positive on an at-home test—but just barely. The line signifying a positive result was so faint that Astley, an endocrinologist at Boston ...

If a medical test result is inconclusive, the sample did not provide enough information to confirm a positive or negative result. A person may need another test. People can have various medical tests ...

The 21st Century Cures Act gave patients easy access to their health information. Now, some diagnoses delivered without context are causing high anxiety. By Danielle Friedman Late last fall I suffered ...

The small intestinal bacterial overgrowth (SIBO) breath test is a noninvasive test that measures the amount of gases produced by bacteria in the small intestine. Small intestinal bacterial overgrowth ...

New COVID-19 restrictions for international travel and other activities are fueling consumer demand for highly accurate polymerase chain reaction, or PCR, tests with rapid turnaround times. Some ...

If you love kids and have been trying to get pregnant for a while, it’s important to know when you ovulate. This matters because you can significantly increase your chances of getting pregnant by ...

Educators have been bracing for them, and now they’re here: the first state test results since COVID-19 interrupted K-12 schooling. Districts, states, and schools are poring over the data from spring ...