Thirty years of fast food: Greater variety, but more salt, larger portions, and added calories are potentially fueling the obesity epidemic, according to a new study. Despite the addition of some healthy menu items, fast food is even more unhealthy for you than it was 30 years ago.

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Thirty years of fast food: Greater variety, but more salt, larger portions, and added calories are potentially fueling the obesity epidemic, according to a new study. Despite the addition of some healthy menu items, fast food is even more unhealthy for you than it was 30 years ago.