1. Burger King cheeseburger
BK is the king of this burger battle, as it boasts the least amount of saturated fat (5g), total fat (12g, tied with McDonald's), carbs (27g), sodium (560mg), and cholesterol (40mg, also tied with McDonald's). Granted, it doesn't have the mayo or the 1/4lb of beef found in BK's signature Whopper, but you can eat it safely knowing it's the healthiest basic fast-food cheeseburger on the market.
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Lee Breslouer is a senior writer for Thrillist, and could go for a Sonic burger right about now. Follow him to cravings: @LeeBreslouer.