ScienceInsights

Learn the key signs of PCOS, how doctors diagnose it, and why getting an accurate answer often takes longer than it should.

Most lower back pain improves with simple home care, but some symptoms need prompt attention. Learn what helps, what to skip, and when to see a doctor.

Walking a mile burns roughly 80–100 calories, but your weight, terrain, and incline matter far more than your pace.

Lexapro typically takes 6 to 8 weeks to work fully. Here's what to expect each step of the way and when to talk to your doctor.

Alcohol is classified as a depressant, but it doesn't always feel that way. Here's how it actually affects your brain and why its effects change over time.

Cold sores typically heal in 7–10 days, but treatment, triggers, and whether it's your first outbreak can all affect how long yours lasts.

5mg of Lexapro is below the standard starting dose, but it can still be effective for some people. Here's what to know about this lower dose.

A high red blood cell count can stem from dehydration, low oxygen, sleep apnea, smoking, or rarer conditions like polycythemia vera. Here's what it means.

Sleeping with a kidney stent can be uncomfortable, but the right positions, pillow support, and nighttime habits can help you rest more easily.

Collagen supports your skin, joints, bones, and more—but how much does your body actually use? Here's what the science says.