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 ...

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 ...

Normal ferritin levels range from 15-150 ng/mL for females and 15-200 ng/mL for males. High ferritin levels can indicate an iron overload or inflammation. Eating iron-rich foods can help you raise ...

Thyroxine (T4) levels differ from person to person but usually exist within a consistent range. Abnormal T4 levels can lead to various symptoms and complications, including mental health and digestive ...

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 vitamin deficiency test can reveal if you’re low on folate, iron, vitamin B12, and more, but you may need guidance to interpret the results. See our dietitian’s take on some of the best vitamin ...

Angela Myers is a freelance writer covering mental health, wellness and nutrition. She’s also conducted award-winning research on how to better communicate about sexual violence prevention and mental ...

Lindsay Modglin is a nurse and professional writer who regularly writes about complex medical topics, as well as travel and the great outdoors. She holds a professional certificate in scientific ...

Two beaches in Central Illinois temporarily closed recently due to “high bacteria levels,” according to the Illinois ...