It's typical how most people really want to immediately buy into the simple fixes and religiously believe them without knowing why it worked. Overweight? Must be the fructose (recently) / carbs (a while back) / fats (further back). Same old story. Somebody makes rounds in media and makes a lot of money after publishing a book with something "new" - a simple fix. Fortunately we have people like Lyle McDonald, Alan Ara…
While it seems unimaginable today, in the 80's a breakfast cereal commercial begins, "Can you pinch an inch ?". This commercial ran so often that it forced a lifelong association: more than 1 inch of belly fat means you are out of shape.
I have probably pinched myself once a day, every day, for decades. When I am "out of shape" I stop drinking my calories (juice, soda, milk). It's effortless and only takes a few days to recover.
Wait too long with any problem and there will be no easy fix.