I'm 99% certain it's a new lack of fiber as the American diet becomes more attuned to meat and starch.
I would bet MONEY that if you looked at IBD rates among people who tend to frequent taco bell (lots of beans == lots of fiber) and people who tend to frequent, say, McD's, you'd see a lower rate among TB-goers. Doesn't seem like a hard experiment to set up.
I would bet MONEY that if you looked at IBD rates among people who tend to frequent taco bell (lots of beans == lots of fiber) and people who tend to frequent, say, McD's, you'd see a lower rate among TB-goers. Doesn't seem like a hard experiment to set up.