Paul Offit

Paul Offit, MD, is a professor of pediatrics at the University of Pennsylvania. He is the author of Do You Believe in Magic? The Sense and Nonsense of Alternative Medicine.

  • The Vitamin Myth: Why We Think We Need Supplements

    Nutrition experts contend that all we need is what's typically found in a routine diet. Industry representatives, backed by a fascinating history, argue that foods don't contain enough, and we need supplements. Fortunately, many excellent studies have now resolved the issue.

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Where Time Comes From

The clocks that coordinate your cellphone, GPS, and more

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Computer Vision Syndrome and You

Save your eyes. Take breaks.

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What Happens in 60 Seconds

Quantifying human activity around the world

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