ScienceInsights

A resting heart rate above 100 bpm can signal stress, illness, or something more serious. Learn what raises it and when to take action.

Learn how to safely space out 1000 mg Tylenol doses, stay within daily limits, and avoid accidental overdose from hidden acetaminophen sources.

From saltwater rinses to vitamin deficiencies, learn what actually helps canker sores heal faster and how to prevent them from coming back.

Whether to eat before a workout depends on timing, food choice, and your goals. Here's what the science actually suggests.

For most healthy people, one egg a day is fine—but your ideal intake depends on your health history, diet, and how your body handles cholesterol.

Anal cancer often mimics hemorrhoids, making early symptoms easy to dismiss. Learn what signs to watch for and when to talk to your doctor.

Heel pain that's worst in the morning could be plantar fasciitis. Learn the key signs, risk factors, and what to expect if you have it.

Your eyes contain around 6 million cones that make color vision possible. Learn how they differ from rods, why cone counts vary, and how they change over time.

Most newborns lose a little weight at first, then steadily gain it back. Here's what healthy growth looks like in the first month.

Learn how to spot swollen tonsils, what's causing them, and when it's time to see a doctor.