ScienceInsights

Your epidermis does far more than cover your body. Learn how this thin outer skin layer controls hydration, blocks UV damage, and defends against disease.

Most men fall within a fairly narrow range of penis girth. Here's what the research says about averages, variation, and when size becomes a medical concern.

Sore muscles aren't caused by lactic acid. Learn what actually happens in your muscles after exercise and what genuinely helps with recovery.

Chlamydia spreads through sexual contact and often causes no symptoms. Learn how transmission works, who's at risk, and why regular testing matters.

Fentanyl is 100x stronger than morphine. Learn how it affects the brain and body, why it's so risky, and how to recognize an overdose.

Burn blisters protect healing skin, so popping them isn't a good idea. Learn how to care for one safely and when to see a doctor.

Practical ways to manage morning sickness, from protein-rich meals and ginger to when it's time to call your doctor.

Some foods and simple eating habits can genuinely help reduce gas and bloating. Here's what the evidence says about ginger, fennel, probiotics, and more.

340B hospitals get steep discounts on drugs to stretch resources for low-income patients. Here's how the program works and why it's controversial.

Nasal congestion comes from swollen blood vessels, not mucus. Learn what triggers it and which relief options actually work.