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 ...

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 ...

Your doctor just mentioned ordering a comprehensive metabolic panel, and you’re wondering what that means and why you need it. Don’t worry — this isn’t some scary, complicated procedure. It’s actually ...

A new kind of blood test promises to find cancer early—sometimes even before symptoms appear. The pitch is compelling: a single sample of blood could scan the body for dozens of different cancers at ...

Scientists have developed a highly accurate blood test that can detect brain tumours, including aggressive glioblastomas, with over 90% precision. By identifying specific proteins in the blood, the ...