Your doctor says everything looks fine, but you still feel terrible. The problem might not be your health but how labs define “normal.” Understanding the difference between normal and optimal could ...

You're likely no stranger to getting lab work done every year or so to check on your overall health. Whether it's part of a routine checkup or because something's out of whack and you want a closer ...

As a lifelong health and fitness enthusiast with 15 years of experience, Rachel MacPherson is passionate about cutting through fads and noise. Her aim is to clearly communicate health information with ...

Higher than normal blood ammonia levels are called hyperammonemia. Acceptable levels depend on age and sex but range from about 42 µg/dL in infants to 200 µg/dL adults assigned male at birth. When you ...

DEAR DR. ROACH: I’m a 74-year-old male in good health. My lab work has been pretty consistent over several years. My cholesterol level is always below 200 mg/dL with a high HDL (80 mg/dL). All of ...