There’s been a lot of coverage of the woman who ate Starbucks for a year recently. And of course there was the documentary Super Size Me which featured man who’s health deteriorated while on a McDonald’s only diet.

But now, KCCI reports of a science teacher who wanted to give McDonald’s another test. The key to his experiment was that he exercised daily and only ate his recommended calorie intake. 

Shockingly, he lost weight and even lowered his cholesterol. 

The lesson: your choices matter.