Spurlock also admitted to struggling with alcoholism. While reflecting on his sobriety journey, Spurlock told ABC News he had to start with himself, adding, "I wished I'd done it 10 years ago."
That’s true. He died of pancreatic cancer. Heavy alcohol use can lead to conditions such as chronic pancreatitis, which is known to increase pancreatic cancer risk. The largest associated cause of pancreatic cancer is food that is cooked until charred or blackened, which you won’t find much of at McDonald’s.
With that being said, don’t eat at McDonald’s. It’s terribly malnutritious, laden with chemical treatments, and sourced by forced prison slave labor.
His method wasn't specifically about eating super-size, it was just that he ate nothing but McDonald's for a month (and probably a lot of booze according to various sources).
I believe a school tested it with some volunteers, someone also challenged the original movie by eating a healthy amount of calories of just McDonald's food.
And during that documentary (which no one was able to replicate) he was essentially an alcoholic, which is the real reason his liver enzymes were elevated and is statistically a much greater contributor to poor health than McDonalds.
He was a raging alcoholic who hid his illness from the medical professionals who examined him as part of his Super Size Me "experiment." A lifetime of booze did way more damage than 30 days of McDs possibly could.