Unhealthiest fast food burgers revealed, from McDonald's to Wendy's

The patties are cooked right in front of you and loaded with toppings, but Five Guys' classic cheeseburger is the unhealthiest burger in America.

And McDonald's, frequently slammed for its salty, overly processed food, actually had one of the healthiest cheeseburgers.

That's according to researchers who analyzed the at 24 fast food chains in the US, comparing

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