it doesn't work at all. think about why. different foods partition different in the body, cause metabolism to slow or speed up, effect insulin, mtor, ghrelin etc.
skinny dudes get away with it cause they are already skinny. but the misconception is that being skinny means you have a healthy diet. i can find crackheads living under the bridge who are skinny and all they eat and drink are fast food and alcohol. being skinny doesn't mean shit. how do you think their organ health is? their gut health? their teeth? their skin? their mind? their longevity? these are all factors in fitness not measured by how much you weigh
you would never give a show dog garbage food, they give them the best high quality food expensive. or a racehorse crappy hay and food. so why do humans eat garbage? marketing and stupidity