Nutrition basics
Learning Center
Acne
Learn more about this common skin condition, including causes, treatments and simple skin care steps you can do at home to help control it.
Adenomyosis
Displaced endometrial tissue from adenomyosis can cause an enlarged uterus and painful, heavy periods.
Air travel during pregnancy: Is it safe?
Consider these guidelines if you need to fly while you're pregnant.
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.
Allergy medications and pregnancy: What's safe?
Find out what medicines can help you manage allergies while you're pregnant.
Alzheimer's or depression: Could it be both?
Alzheimer's and depression have some similar symptoms. Proper treatment improves quality of life.
Alzheimer's stages: How the disease progresses
Alzheimer's stages — common behaviors as the disease progresses.
Amenorrhea
Absence of menstruation (amenorrhea) may be linked to an underlying, treatable problem. Learn about amenorrhea causes and when to seek help.
Amniocentesis
Find out about this prenatal test that checks the fluid surrounding the baby during pregnancy.
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