Fitness basics
Learning Center
Napping: Do's and don'ts for healthy adults
Napping can benefit your health. Find out how to make the most of a nap.
Nonprescription acne treatment: Which products work best?
Find out how acne treatments you can buy at the store differ, what main ingredients to look for and how to use them for best results.
Nonprescription laxatives for constipation: Use with caution
Looking for a laxative to relieve constipation? Learn how different nonprescription medicines work and be aware of some risks.
Nuts and your heart: Eating nuts for heart health
Discover how walnuts, almonds and other nuts can improve heart health.
Osteoporosis treatment: Medications can help
Find out more about your options for bone-preserving drugs, including how often you need to take them and what side effects you might expect.
Paleo diet: What is it and why is it so popular?
Is a diet based on what early humans might have eaten right for modern humans?
Penis health: Identify and prevent problems
Understand the factors that affect penis health and how to identify problems.
Penis-enlargement products: Do they work?
Considering penis enlargement? Get the facts about male-enhancement pills, pumps, exercises and surgeries.
Planning to travel with atrial fibrillation?
Extra preparation before a trip can keep your plans — and heart — running smoothly if you have an irregular heartbeat. Get expert recommendations for your pre-travel checklist.
Poison ivy and other summer skin irritants
Take a look at these bumps, bites and rashes. Find out what causes them and how they can be treated.
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