A potential exposure to human immunodeficiency virus (HIV) might make someone wonder how soon they can get results from a test. Some HIV tests can conclusively detect the virus in as little as 6 weeks ...

Syphilis testing typically requires obtaining a blood sample and sending it to a lab. The wait for results ranges from hours to days. The FDA has authorized a new at-home syphilis test, a ...

A fasting blood test requires you to avoid eating or drinking anything for some time before your test. The amount of time to fast varies for different tests. It’s generally in the range of 8 to 12 ...

Hydrogen breath tests are a diagnostic tool that doctors use to identify small intestinal bacterial overgrowth (SIBO), lactose intolerance, and other digestive conditions. The test measures the amount ...

Have your COVID-19 rapid tests expired? Don’t toss them yet. Federal regulators have extended some tests’ expiration dates, meaning certain offerings are now usable for months longer. The reason for ...

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 ...