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Learning Center
Myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD)
Learn about the symptoms, diagnosis and treatments for this autoimmune disease that attacks nerve fibers in the body.
Napping: Do's and don'ts for healthy adults
Napping can benefit your health. Find out how to make the most of a nap.
Neti pot: Can it clear my nose?
Learn more about this container designed to rinse debris or mucus from the nasal cavity.
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.
Ozone air purifiers: Can they improve asthma symptoms?
Ozone air purifiers don't reduce asthma symptoms. In fact, they can make asthma worse.
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?
Pap smear
Pap smear is often recommended for cervical cancer screening. Learn how it's done and what abnormal Pap test results might mean.
Petroleum jelly: Safe for a dry nose?
Rarely, inhaling petroleum jelly for prolonged periods can cause lung inflammation (lipoid pneumonia).
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