Nutritional supplements
Learning Center
Delayed ejaculation
Learn what can cause delayed or absent ejaculation and how it can be treated.
Cystic fibrosis
This inherited condition causes severe damage to the lungs, digestive system and other organs. Learn about improvements in screening and treatments.
Cryotherapy for prostate cancer
Find out how very cold temperatures are used to freeze tissue and treat prostate cancer. Learn about the side effects and potential benefits of cryotherapy.
Coughing more after quitting smoking: What's the deal?
If you cough more than usual after you give up cigarettes, find out what it might mean and when to call the doctor.
Circumcision (male)
Learn about the benefits and risks of surgery to remove the skin that covers the tip of the penis.
Childhood apraxia of speech
This speech disorder is caused by a problem with communication between the brain and the muscles used for speech. Speech therapy can help.
Cervical length: Why does it matter during pregnancy?
If cervical length during pregnancy shortens too soon, there might be an increased risk of preterm labor.
Cellulitis: How to prevent recurrent episodes
Learn to treat and prevent recurrent cellulitis.
Cancer risk: What the numbers mean
The news is full of reports about cancer risk, but what does it all mean for you? Find out how to interpret cancer statistics.
Calcium supplements: When should they be taken?
Timing matters when taking these supplements. Learn how to take them.
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