Alternative medicine
Learning Center
COVID-19: Long-term effects
Learn about the possible long-term effects of COVID-19.
Candida cleanse diet: What does it treat?
Candida cleanse diets that replace processed food with fresh foods improve health but don't necessarily stop yeast overgrowth.
Canker sore
Canker sore — Learn about the causes, treatment and prevention of this painful mouth sore.
Cervical cancer
Screening with Pap tests can reduce the risk of this cancer that begins in the cervix. Learn more about symptoms, causes, prevention and treatment.
Chronic pelvic pain
Ongoing pain in the pelvis can be a symptom of another disease or a condition in its own right. Learn how it's diagnosed and treated.
Circumcision (male)
Learn about the benefits and risks of surgery to remove the skin that covers the tip of the penis.
Colloidal silver supplements: Are they safe?
Colloidal silver supplements are often promoted as cure-alls, but evidence of effectiveness is lacking. Side effects range from change in skin color to organ damage.
Colon cleansing: Is it helpful or harmful?
Get the facts before you try this technique that's popular among some people who practice alternative medicine, who claim it has many health benefits.
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.
Delayed ejaculation
Learn what can cause delayed or absent ejaculation and how it can be treated.
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