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Learning Center
Ankylosing spondylitis
Learn about this inflammatory disease that can cause some of the vertebrae in the spine to fuse over time.
Kratom: Unsafe and ineffective
Users claim kratom lifts mood and boosts energy, but there are many safety issues and questions about whether it works. Learn more before trying it.
Hormone therapy for prostate cancer
Find out what to expect during testosterone-blocking therapy. Learn about choices, including medicines and surgery.
Blood in semen
Finding blood in your semen can be alarming, but the cause is usually benign. Find out possible causes and when to see a doctor.
Zinc for colds: The final word?
Everyone's heard of taking zinc for colds. But does it really work?
Does prickly pear cactus have health benefits?
Have you heard about prickly pear cactus? Find out about some surprising health benefits of this versatile plant.
Valerian: A safe and effective herbal sleep aid?
Valerian — Can this sleep aid help you sleep better?
High cholesterol treatment: Does cinnamon lower cholesterol?
Can cinnamon lower cholesterol?
Do infrared saunas have any health benefits?
How is an infrared sauna different from a traditional sauna? Light provides the heat.
High-dose vitamin C: Can it kill cancer cells?
High-dose vitamin C has been touted by some as an effective alternative cancer treatment.
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