Should we all be concerned about our cortisol levels? I took a blood stress test and spoke with experts to find out.

As a rule, younger people need less vitamin D than older people, regardless of sex. This article explains average vitamin D ...

Medically reviewed by Steffini Stalos, DO A vitamin B12 blood test is a reliable way to determine if you have adequate levels ...

while non-fasting tests can be taken at any time. “Fasting blood sugar is unaffected by recent food intake, providing a baseline to see if the levels are in normal range,” explains Burnstine.

Blood tests would help further narrow down the cause of fatigue. Anemia is a condition involving reduced blood capacity to transport oxygen. This results from either lower than normal levels of red ...

Scientists at Rutgers Health have discovered that a simple blood test could diagnose asthma and determine its severity, a ...

clinicians determine what are called reference intervals by measuring a blood test in a range of healthy people. They usually take the middle 95% of these healthy values and call that “normal ...