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 ...

Non-fasting glucose levels are usually 125 milligrams per deciliter of blood (mg/dL) or lower, but it can depend on when you last ate. A random blood glucose test is used to measure blood glucose ...

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 ...

Ferritin is a protein that stores and releases iron (a mineral) in the body. A ferritin test measures how much of this protein is in your blood, helping diagnose health conditions caused by too much ...

Though my cortisol test results stressed me out, I'm glad I know more about how cortisol affects my health. Anna Gragert (she/her/hers) was previously the lifestyle editor at HelloGiggles, deputy ...

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 ...

What are normal testosterone levels by age? An older photographer mentors a younger one. Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical ...

Hemoglobin helps red blood cells carry oxygen to your muscles and tissues. Abnormal hemoglobin levels can be a sign of several health problems. Hemoglobin is a component of your blood that delivers ...

System-level test (SLT), once used largely as a stopgap measure to catch issues missed by automated test equipment (ATE), has evolved into a necessary test insertion for high-performance processors, ...