One-third of premature deaths in the U.S. are attributable to poor nutrition and physical inactivity. Dr. Robert Baron, UCSF Professor of Medicine, explains the costs of poor nutrition and what you can do to improve your diet. The healthiest diet limit sugars, refined grains, and large amounts of saturated and trans fat. He advises eating fruits and vegetables, healthy oils, whole grains, legumes, and nuts.

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Above is a transcript by the University of California.