Fitness basics
Learning Center
Butter vs. margarine: Which is better for my heart?
Margarine usually tops butter for heart health. But not all margarines are created equal.
Vitamin D and MS: Is there any connection?
Some research suggests that vitamin D may reduce the risk of multiple sclerosis (MS).
Priapism
Understand the symptoms, possible causes and treatment of prolonged erection of the penis, including when to seek emergency care.
High blood pressure and cold remedies: Which are safe?
Among cold medicines, decongestants cause the most concern for people who have high blood pressure.
Fear of public speaking: How can I overcome it?
Learn tips to become a more-confident public speaker
Artificial tears: How to select eye drops for dry eyes
Not all eye drops are the same. Here's what to consider when choosing artificial tears for dry eyes.
Male hypogonadism
This condition affects the ability of men's bodies to produce enough testosterone or enough sperm or both.
Retrograde ejaculation
Learn about the symptoms and treatment options for this condition that can cause male infertility.
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.
How fit are you? See how you measure up
Find your fitness level with these simple fitness tests.
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