Alcohol breath tests, commonly called breathalyzers, measure blood alcohol content (BAC). The more intoxicated a person is, the higher their BAC. This test is often used by law enforcement to ...

More than half the world’s population is thought to be living with H. pylori. Most people do not have any symptoms. But when an infection grows too much, it can lead to stomach ulcers and chronic ...

A stool test is a diagnostic procedure that involves analyzing fecal matter, or poop, to check for signs of infection, inflammation, or disease. The specific analysis depends on a person’s symptoms ...