The specific disease doctrine is the grand refuge of weak, uncultured, unstable minds, such as now rule in the medical profession. There are no specific diseases; there are specific disease conditions.
I realize it has become too easy to find a diet to fit in with whatever you happen to feel like eating and that diets are not there to be picked and mixed but picked and stuck to, which is exactly what I shall begin to do once I've eaten this chocolate croissant.