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 ...

Testosterone tests measure levels of testosterone in the blood. At-home test kits can be convenient, but they cannot diagnose underlying health conditions that cause high or low testosterone. Share on ...

Normal ferritin levels range from 15-150 ng/mL for females and 15-200 ng/mL for males. High ferritin levels can indicate an ...

Chronic fatigue, unexplained weight loss or gain, infertility, and hair loss can all signal a hormonal imbalance. You might consider a hormone test if you’re experiencing these or more. Hormone tests ...

A fasting blood test requires you to avoid eating or drinking anything for some time before your test. The amount of time to fast varies for different tests. It’s generally in the range of 8 to 12 ...

Though my cortisol test results stressed me out, I'm glad I know more about how cortisol affects my health. Anna Gragert Senior Editor, Health and Home Anna Gragert (she/her/hers) was previously the ...