A polymerase chain reaction (PCR) test detects genetic material from a pathogen or abnormal cell sample. Ways of collecting samples include a nasal swab, a saliva swab, or taking a sample of blood.

With home testing options increasing more than ever, you now also have the ability to test for kidney function within the comfort of your own home. Learn more about our four best picks for at-home ...

A calprotectin stool test detects levels of calprotectin in stool. This protein indicates bowel inflammation. It can help diagnose and monitor conditions such as inflammatory bowel disease (IBD). A ...