By Tobias Carroll Eighteen years ago, the documentary Super Size Me explored what regular fast food consumption at massive levels could do to a human body. The results, needless to say, were not great, and preceded McDonald’s removing its “super size” menu options. But what about regularly eating fast food at a more measured pace? What would it be like to, say, eat a Big Mac once a day for 50 years? That’s not a rhetorical question, as it turns out. The Washington Post recently wrote about a man named Don Gorske. Gorske is now 68, and for the last 50 years he’s eaten a Big Mac nearly every day…