Companies who sell dieting solutions probably avoid Colorado. There isn't much call for their services there. Only one in five Coloradans are considered to be obese. That still sounds high, but the national average is well over one in four.
It's probably just as well Coloradans are comparatively healthy, because otherwise, they might struggle to breathe. The air in the state is very thin because the state is a massive 7,000 feet above the level of the sea. Denver has 17% less oxygen in the air than your average American city.