Nutrition basics
Learning Center
Allergies
Allergy symptoms can range from mild to severe, even life-threatening. Most allergies can't be cured, but treatments can help.
Rheumatic fever
Learn about this complication of strep throat and scarlet fever and what you can do to prevent it.
Hay fever
Find out more about how to diagnose and get relief from this common condition that can make you feel awful, seasonally and year-round.
Diet soda: How much is too much?
Diet soda may help you cut calories, but other low-calorie options abound.
Caffeine: Is it dehydrating or not?
Caffeinated drinks usually won't dehydrate you, but water is still your best option.
Juicing: What are the health benefits?
Learn about the pros and cons of extracting the juice from fresh fruits and vegetables.
Alkaline water: Better than plain water?
Health claims about alkaline water abound, but plain water is usually best.
Body lice
Body lice are tiny insects that live in your clothing and feed on your blood. Find out how to treat and prevent this itchy nuisance of a bug.
Mononucleosis
Learn about the symptoms and treatment of the kissing disease in adults and children.
Strep throat
Learn more about the symptoms, causes and treatment of this throat bacterial infection in children and adults.
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