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How much vitamin D is enough? Report sets new levels

Long-awaited new dietary guidelines say there's no proof that megadoses of vitamin D prevent cancer, diabetes or other conditions. Some studies suggest that too much could actually increase risk of some cancers.Full story

Ban tater tots in school? 'That would be so not cool'

Potato growers are fighting back against efforts to ban or limit potatoes in federal child nutrition programs, arguing the tuber is loaded with potassium and vitamin C and shouldn't be considered junk food. Full story

Scientists seek link between chemicals, cancer

  Experts from the Institute of Medicine are trying to determine what research is needed to prove a connection between chemicals in the environment and increased risk of breast cancer. NBC's Robert Bazell reports.

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Special masks aid health workers in H1N1 fight

Agent Orange linked to serious heart disease

Obese and pregnant? Watch your weight

Even docs often don’t know which test is best

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  How to avoid a misdiagnosis

According to the Institute of Medicine, misdiagnoses are to blame for nearly 98,000 patient deaths a year — more than car accidents and breast cancer. Dr. Keri Peterson discusses how you can protect yourself.

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Prescription pills
Prescription pills

**FILE** A pharmacy worker counts pills in Omaha, Neb. on Tuesday March 16, 2004. Medication mistakes injure well over 1.5 million Americans every year,the Institute of Medicine said. (AP Photo/Nati Harnik, FILE)