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 ...

Urine tests measure specific substances in your urine, such as electrolytes, proteins, and bacteria. These tests can reveal a lot about your health, particularly when gradual changes or big jumps ...

Using a blood pressure chart by age can help you interpret your results to see how they compare to the normal ranges across groups and within your own age cohort. Monitoring your blood pressure (BP) ...

Men with a PSA level above the median for their age group are at higher risk for prostate cancer. The concept of what is "normal" enters into nearly every aspect of clinical decision making. For ...

Your blood sugar goal may vary depending on whether you have diabetes, which type of diabetes you have, and whether you’re pregnant. Keeping track of your blood sugar is a key part of diabetes ...

Labs calculate normal by testing everyone who walks through the door, including patients with undiagnosed conditions and chronic diseases. The middle 95 percent becomes the reference range, whether ...