Oxidative stress happens when free radicals outnumber antioxidants, which can damage fatty tissue, DNA, and proteins throughout your body. Oxidative stress is linked to diseases like diabetes, ...

You can have left arm numbness due to your sleeping position or an injury. But it can also indicate underlying health conditions, including heart attack or stroke, that may need medical attention.

Traveling at high altitude can be hazardous. The information provided here is designed for educational use only and is not a substitute for specific training or experience. Princeton University and ...