Nutrition basics
Learning Center
Cryptogenic organizing pneumonia
Cryptogenic organizing pneumonia affects your lungs' small airways and air-exchange sacs.
Degenerative changes in the spine: Is this arthritis?
Degenerative changes in the spine visible on X-rays indicate osteoarthritis of the spine.
Demyelinating disease: What can you do about it?
Learn the causes and types of these diseases that affect the protective covering of nerves, which include multiple sclerosis. Also learn how they're treated.
Dental braces: When to start
Dental braces are recommended for many children — When is the best time to start?
Did the definition of Alzheimer's disease change?
What the change in the research definition of Alzheimer's disease means for you.
Diet soda: How much is too much?
Diet soda may help you cut calories, but other low-calorie options abound.
Digestion: How long does it take?
Digestion takes about two to five days, depending on your system.
Discolored semen: What does it mean?
Find out what causes discolored semen.
Does honey offer sweet relief for allergies?
You've probably heard the buzz about honey for allergies — but does this sweet remedy deliver?
Does soy really affect breast cancer risk?
Soy foods reduce the risk of breast cancer, but more research is needed to determine whether soy supplements are equally beneficial.
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