"Supersize Me" was a bit unrealistic in that he ate McDonalds 3 meals a day every day, always supersized when asked and NEVER drank a diet soft drink, only the king size sugared soft drinks that have, I'm guessing, the equivalent of at least 10 teaspoons of sugar in each one. Nonetheless, having said all that, within 2 weeks after starting the McDonalds "diet", his liver chemistry was already in bad shape (but recoverable), not to mention the weight gain. That's what scares me about eating that crap (though I do once in a while).