Diurnal cortisol tests measure your cortisol levels at various points, from the time you wake up until the time you go to bed. They can help a healthcare professional visualize your adrenal gland ...

For most healthy women, optimal fasting insulin levels should be less than 25 mIU/L (milli-international units per liter), ...

A thyroid-stimulating immunoglobulin (TSI) test is a blood test that can help diagnose Graves’ disease, an autoimmune condition that causes an overactive thyroid. A TSI test measures levels of TSIs in ...

This article was reviewed by Felix Gussone, MD. If you’ve been feeling a bit more couch potato than go-getter lately, dragging through the day, snapping at people for no reason, or wondering where ...

Doctors can diagnose fatty liver disease, now called metabolic dysfunction-associated steatotic liver disease (MASLD), using blood tests that measure serum liver enzyme levels. Elevated enzyme levels ...