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 ...

Estradiol: 2-14 ng/dL (female, follicular); 2-16 ng/dL (female, luteal); <3.5 ng/dL (postmenopausal); 1.5-5 ng/dL (male) ...

These normal ranges are used nearly everywhere in medicine. But reference intervals face a big challenge: What's normal for you may not be normal for someone else. Nearly all blood count markers are ...

When most people are told their blood work looks normal, they assume it means they are healthy. In reality, functional medicine lab testing reveals a far more uncomfortable truth. Normal does not mean ...

This is read by an automated voice. Please report any issues or inconsistencies here. You don’t feel like yourself. Maybe you’re low on energy, you’re not sleeping well, or your mood feels harder to ...

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 ...

The properties of the blood and the ease of its retrieval make it a useful source for doctors to analyze to measure specific features of homeostasis within patients. This allows for accurate diagnosis ...

In medicine, a person’s blood-test results are compared with the average range in a population. But results are highly individual and tightly regulated around a person’s own stable values. Changes to ...

You receive a phone call: the results from routine blood tests show a “low white cell count”. Your doctor explains that more investigations are necessary, perhaps a referral to the haematologists.