Vitamin D may protect against young-onset colorectal cancer

Consuming higher amounts of Vitamin D—mainly from dietary sources—may help protect against developing young-onset colorectal cancer or precancerous colon polyps, according to the first study to show such an association. The study, recently published online in the journal Gastroenterology, by scientists from Dana-Farber Cancer Institute, the Harvard T.H. Chan School of Public Health, and other institutions, […]

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Physics shows why 20 seconds is right for hand-washing

Twenty seconds. That’s how long you need to wash your hands to remove germs, a new physics study confirms. Typical hand-washing guidelines—including those from the U.S. Centers for Disease Control and Prevention—advise scrubbing your hands for a minimum of 20 seconds. To assess that recommendation, researchers used a mathematical model to examine the key mechanics of hand-washing and […]

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