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Most hair, body, and personal care products contain “chemicals of concern.” A Columbia epidemiologist explains how to figure out what's safe to buy and use.

Science shows a connection between the food you eat and the health of your brain.

Just five minutes of walking every half hour offsets harmful effects of prolonged sitting, a Columbia University study has found.

The American Academy of Pediatrics is recommending immediate action and treatment to help address the epidemic of obesity in children.