Faulty premise of the movie is that the obesity epidemic is actually caused by the overconsumption of carbohydrates
...and not necessarily by people eating out more.
I eat largely a low-carb diet. I am lean and muscular even though most of my calories comes from a high-fat and high-protein diet. I still count calories, by the way.
However, the movie doesn't even address this. It buys into the corrupt health establishment that demonizes high-fat foods that has been going on for the past 50 years. Instead, they push the lie that we should eat a diet comprised of calories that comes from 65% carbs/25% protein and 10% fat. The pyramid food chart being pushed by the government was written by grain lobbyists.
The entire movie is laced with anti-fat (as a food source) propaganda, and it is rather frustrating to watch for me.
When I go to McDonald's, I will often order burger patties with cheese (no bun) and when they were available, a salad for my side dish. I regret that salads have been taken away, but I suppose that Mr. Spurlock's film did move fast food restaurants to provide these for a time. In fairness, one can't expect McDonald's to be a place for salad. And it goes without saying that I will always get a diet soda.
But then, I do acknowledge that what I insist in eating is not the default options offered by fast food establishments--which is a burger and a side of french fries. In fact, I have to go to the cashier in order to forgo my bunless burger order (if I order it through a kiosk or an app on my phone, I can choose no bun, but I still pay for the full cost of the burger).