A blood osmolality test measures the blood for the concentration of certain dissolved particles. This test can show whether a person has an irregular balance of fluids in their body. Osmolality tests ...

Lindsay Modglin is a nurse and professional writer who regularly writes about complex medical topics, as well as travel and the great outdoors. She holds a professional certificate in scientific ...

This product goes further than others that only tests iron levels. By measuring ferritin levels, it looks at the amount of overall iron storage and whether a person has normal iron levels. This test ...

Mark Gurarie is a writer covering health topics, technology, music, books, and culture. He also teaches health science and research writing at George Washington University's School of Medical and ...

The blood test that detects nicotine is called a cotinine test. It measures recent tobacco use and exposure. Cotinine is a chemical that comes from the breakdown of nicotine in the body. A blood test ...

A metabolism test provides a snapshot of certain hormone levels to understand how your body converts calories into the energy that fuels every physical, biological, and mental activity. These tests ...

What Is a RDW Blood Test? An RDW blood test – also known as a red blood cell distribution width blood test – is a measure of the difference in your red blood cells’ size and volume. RDW is one part of ...

Researchers working on blood-based cancer screening have reached a threshold that could change how early-stage tumors are ...

Becca Stanek is an experienced writer and editor who is passionate about exploring the ways we can feel better mentally and physically to get the most out of our lives. She has worked for publications ...