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 ...

A hemoglobin test measures the amount of hemoglobin in red blood cells, which is essential for transporting oxygen throughout the body and carbon dioxide back to the lungs. Normal hemoglobin levels ...

At-home food sensitivity tests, specifically IgG tests, do not reliably identify triggers for food-induced conditions. Allergy societies recommend against their use for food sensitivities and ...

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 ...

As the nation experiences what many experts believe is the second-largest wave of COVID infections since the pandemic started, many Americans will be checking to make sure they don’t have the ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Kate Colby, MPH, is a public health expert with extensive experience in infectious disease epidemiology. You may wonder how to know when or if you should get a flu test if you have flu-like symptoms.