BACKGROUND: The Cortecs Diagnostics Helisal Assay test is a quantitative immunoassay for salivary IgG antibodies against Helicobacter pylori. Saliva can be obtained simply with the kit in the general ...

ASCORBIC acid has been found to have a marked inhibitory effect on urease activity. With some preparations of the enzyme, the formation of ammonia from urea is completely inhibited by a concentration ...

You’ll notice the language used to share stats and other data points is binary, fluctuating between the use of “male” and “female” or “men” and “women.” While we typically avoid language like this, ...

What Is a Food Allergy Test? A food allergy test is a skin or blood test that helps you and your doctor figure out if you’re allergic to specific foods and which ones. Or if you think certain foods ...

You can check your testosterone level with a simple blood test, either at your doctor’s office or with a home test kit. Share on Pinterest Tom Werner/Getty Images Testosterone (sometimes shortened to ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Michael Rosenston is a fact-checker and researcher with expertise in business, finance, and insurance. Julie Bang / Investopedia A Z-test evaluates the significance of a sample mean's difference from ...

Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

If you use an inhaler for your breathing, bring it to the test. You may also be asked to stop taking other heart drugs on the day of your test. If you have questions about your meds, ask your doctor.

The oral glucose tolerance test can diagnose diabetes, gestational diabetes, and prediabetes. You need to stop eating and drinking 8 to 12 hours before the test, but you might be allowed some water.