Cortisol, also known as the stress hormone, plays a vital role in the body by maintaining blood pressure and blood sugar. It also breaks down carbohydrates, lipids (fats), and proteins. Cortisol can ...

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 ...

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.

If you live with performance anxiety, taking a test can be overwhelming. But test anxiety can be managed and these tips may help. Test anxiety is a common form of performance anxiety, which can create ...

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 ...

A false positive result is possible with a rapid COVID-19 test. It happens when a person does not have COVID-19 but still tests positive for the disease. People can use a rapid COVID-19 test at home ...

A lipase test is a blood test that measures the level of a digestive enzyme called lipase in your blood. It may also be referred to as a serum lipase or LPS. What is lipase? Your doctor might order a ...

Testing your internet connection’s performance is even more important with millions of extra workers working from home. You don’t need any extra software—a web ...

What Is the Rheumatoid Factor Test? A rheumatoid factor test, or RF test, is a blood test to look for rheumatoid factors in your blood. High levels of rheumatoid factor can show up in people with ...