Laboratory reference ranges reflect methods, populations, and policies, and experienced clinicians interpret them in context rather than applying fixed cutoffs theoretically.

For decades, getting a blood test followed a hierarchical pattern: You had the blood drawn, then waited for a doctor to get the results and interpret them for you. That’s changing. “People are being ...

Most people think of iron deficiency as something that shows up clearly in a blood test. But in recent years, researchers and clinicians have begun paying attention to a less noticeable condition that ...