Nutrition basics
Learning Center
Adrenoleukodystrophy
Find out about diagnosis and treatment of adrenoleukodystrophy — a hereditary disorder that affects the brain, nervous system and adrenal gland.
Air travel during pregnancy: Is it safe?
Consider these guidelines if you need to fly while you're pregnant.
Airplane ear
That fullness in your ear when on an airplane that's climbing or descending results from uneven air pressure between your middle ear and the environment.
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.
Allergies
Allergy symptoms can range from mild to severe, even life-threatening. Find out what treatments and prevention tips can help.
Allergy medications and pregnancy: What's safe?
Find out what medicines can help you manage allergies while you're pregnant.
Allergy skin tests
Considering skin testing for your allergies? Learn about the risks, results and what to expect during testing.
Alzheimer's: Managing sleep problems
Alzheimer's sleep problems affect both you and your loved one. Consider tips for coping.
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