I am under the impression that IF usually refers to the now popular (thanks BBC) 5:2 schedule. This is the context I've most seen/read about the topic, which o

I am under the impression that IF usually refers to the now popular (thanks BBC) 5:2 schedule. This is the context I've most seen/read about the topic, which often includes the talk of anti-aging and autophagy. But this is all very muddy waters since it's fad diet territory and unscientific claims abound.