Nutrition basics
Learning Center
Yerba mate: Is it safe to drink?
This herbal tea may help you feel more alert and focused, but find out what the possible health risks are.
Phenylalanine in diet soda: Is it harmful?
You may be worried about phenylalanine because of a warning on diet soda. Find out why the warning is there.
Discolored semen: What does it mean?
Find out what causes discolored semen.
Underweight? See how to add pounds healthfully
If you're underweight and not happy about it, try these tips to help you achieve your goal weight.
Lung nodules: Can they be cancerous?
Lung nodules are common. Most aren't cancer. Find out what tests might be recommended if you have a lung nodule.
Swallowing gum: Is it harmful?
Your body can't digest chewing gum. So what happens when you swallow it?
Gallbladder polyps: Can they be cancerous?
The size of gallbladder polyps can be a useful predictor of whether they're cancerous.
Adult bed-wetting: A concern?
Adult bed-wetting is uncommon and requires evaluation by a doctor. Learn about possible causes.
Low blood sodium in older adults: A concern?
For older adults, low blood sodium, known as hyponatremia, can cause death if left untreated.
Spastic colon: What does it mean?
This term is sometimes used to refer to irritable bowel syndrome (IBS) — but how accurate is it?
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