ScienceInsights

Black, smelly stool can come from food and supplements or signal bleeding. Here's how to tell the difference and when to see a doctor.

Cutting sugar is tough at first, but your body responds quickly — from steadier energy and clearer skin to lower blood pressure and gradual weight loss.

Your ideal heart rate depends on your age, fitness level, and activity. Here's what's considered normal at rest and during exercise.

Daily headaches often come down to a few common causes. Learn what keeps the cycle going and when it's worth seeing a doctor.

Learn which memory and thinking changes might signal dementia, how doctors evaluate symptoms, and what steps you can take if you're concerned.

A 25 mg dose of Viagra lasts nearly as long as a full pill. Here's what to expect, who it suits, and how to get the best results from a lower dose.

UTI back pain usually clears up within a few days of antibiotics, but kidney involvement can make it last longer. Here's what to expect and when to seek help.

Natural ways to manage your dog's IBS at home, from elimination diets and probiotics to calming stress-related flare-ups.

Oral vitamin C can support skin health, but absorption limits and mixed trial results mean it's not a simple fix. Here's what the science actually shows.

From cold compresses to eyelid surgery, here's how to choose the right treatment for your eye bags based on what's actually causing them.