Keloids form when healing goes into overdrive. Learn why genetics, skin tone, and injury location all influence your risk of developing these raised scars.
Keratin products promise stronger hair and nails, but some come with real risks. Here's what the science says about when keratin helps and when to be cautious.
Bradycardia can cause fatigue, dizziness, and near-fainting, but a slow heart rate isn't always a problem. Learn what symptoms actually warrant a doctor's visit.
CT colonography uses X-rays to screen for colon polyps without sedation. Learn how it works, how accurate it is, and how it compares to a traditional colonoscopy.