Total testosterone measures the full amount of the hormone in your blood, while free testosterone represents the small, ...

Biomarker testing uses blood, saliva, or tissue to measure specific health metrics and provide insights into your body’s functioning. Testing can identify potential health issues early, track changes ...

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 ...

A complete blood count (CBC) is a common test to diagnose anemia by measuring red blood cell count, hemoglobin, and hematocrit levels. Iron deficiency is a common cause of anemia, and doctors may ...