ScienceInsights

At 34 weeks, most babies weigh around 4.7 pounds. Learn what's typical, what affects growth, and what to expect if your baby arrives early.

Brown period blood is usually just older blood and completely normal. Here's what causes it and when it might be worth checking with a doctor.

Nighttime itching has real causes, from dry skin and bug bites to stress and internal conditions. Here's how to find relief and when to see a doctor.

Protein shakes support muscle repair, appetite control, and recovery — but how much do you actually need, and are they safe? Here's what the science says.

Caffeine withdrawal headaches are common but manageable. Learn why they happen, how to ease the pain, and how to cut back without suffering through them.

Dry, itchy skin often comes down to environment, habits, or your skin's natural changes over time. Here's what's likely causing it and how to help.

3 liters of water a day works well for many people, but your ideal intake depends on body size, activity, and health. Here's how to find your balance.

From early pain relief to recovery, here's how to manage a migraine attack and when to seek emergency care.

Delayed muscle soreness comes from tiny tears in muscle fibers, not lactic acid. Here's what's really happening and how your body adapts over time.

Realistic weekly weight loss depends on your starting weight, body fat, and metabolism. Here's what the science says you can expect.