A cardiologist overhauled his diet to boost his longevity. Here's the grocery store path he takes to stick to his meal plan and avoid bad foods.

A cardiologist overhauled his diet to boost his longevity. Here's the grocery store path he takes to stick to his meal plan and avoid bad foods.

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When cardiologist Eric Topol goes to the grocery store these days, his cart stands out among the crowd. It's no longer filled with boxes or packaged goods, he says it's largely just fresh produce — a big change from what he used to buy.

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