About 2 billion people worldwide are deficient in iodine. Here's how to know if you have a deficiency and treat it with foods ...

Americans are iron deficient and at risk of anemia. You can combat iron deficiency with iron supplements and diet.

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 ...

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 ...

Testosterone therapy can help men with low hormone levels, but experts warn of serious risks including stroke, prostate ...

From dull skin to brain fog, omega-3 deficiency can quietly drain your vitality. Experts share how to spot the signs early ...

All products featured on GQ are independently selected by our editors. However, we may receive compensation from retailers and/or from purchases of products through these links. Testosterone is one of ...

Vitamin D is a fat-soluble vitamin that your body uses to absorb calcium, so it plays a key role in building and maintaining your bones. It’s also involved in immune and muscle function and has ...

Symptoms of low magnesium levels (hypomagnesemia) include fatigue, muscle weakness and cramping, nausea, low appetite, abnormal heartbeat, and mood changes. This deficiency can be hard to detect until ...

Researchers have adapted a rapid diagnostic technology that is able to identify undetected cases of malaria, helping tackle ...