Nutrition basics
Learning Center
10 great health foods
Add these health foods to the menu and give your diet a healthy boost.
Abdominal pain
Everyone experiences abdominal pain from time to time. Find out when it might be cause for concern.
Air travel with infant: Is it safe?
Planning for air travel with an infant? Know how air travel can affect a newborn's ears and breathing, and what you can do to keep your baby comfortable.
Albinism
In this group of inherited disorders, the body makes little or no melanin, a pigment that determines hair, skin and eye color and vision development.
Alcohol use: Weighing risks and benefits
Drinking alcohol in any amount is a health risk that increases with each drink you have. The risk peaks with heavy drinking, including binge drinking, which carries serious health risks.
Alkaline water: Better than plain water?
Health claims about alkaline water abound, but plain water is usually best.
Alzheimer's stages: How the disease progresses
Alzheimer's stages — common behaviors as the disease progresses.
Ambiguous genitalia
Learn about causes and treatment of ambiguous genitalia, a rare disorder of sex development in which a baby's external genitals are not clearly male or female.
Amenorrhea
Absence of menstruation (amenorrhea) may be linked to an underlying, treatable problem. Learn about amenorrhea causes and when to seek help.
Anal pain
Anal pain: Symptom — Overview covers definition, possible causes of this common symptom.
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