Healthy diets
Learning Center
Bump on the head: When is it a serious head injury?
Even a minor injury to the scalp or forehead can cause a large lump. Find out when it's time to see a healthcare professional.
Butter vs. margarine: Which is better for my heart?
Margarine usually tops butter for heart health. But not all margarines are created equal.
COVID-19 and pets: Can dogs and cats get COVID-19?
Find out how COVID-19 can affect dogs and cats, what you can do to protect your pet, and how to care for your pet if it becomes sick.
Caffeine content for coffee, tea, soda and more
Find out just how much caffeine is in coffee, tea, soda and energy drinks. You may be surprised at how much caffeine you're consuming.
Cellulitis infection: Is it contagious?
Cellulitis — a common, potentially serious bacterial skin infection — is not directly contagious.
Cervical cysts: Can they be cancerous?
Cervical cysts usually aren't cancerous. Some types of cervical cysts are so common that they're considered a normal feature of cervical anatomy.
Cigar smoking: Safer than cigarette smoking?
Despite what you might think, cigars aren't that different from cigarettes. Like cigarettes, cigars contain nicotine, tobacco and cancer-causing chemicals.
Circumcision (male)
Learn about the benefits and risks of surgery to remove the skin that covers the tip of the penis.
Clear liquid diet
Need to be on a clear liquid diet? Learn which foods to eat and which foods to avoid.
Clinical depression: What does that mean?
The term "clinical depression" means severe, persistent depression. It's also called major depression or major depressive disorder.