Water fast might give you an answer to a very important question:
"Is your Acne caused by something you are eating?"
If youre Acne improves while you are Water Fasting ... then the answer is YES.
If youre Acne does not improve ... the answer could be both Yes and No.
You still have a job of finding what it could be.
It could be industrially processed foods , preservatives , food additives , Sugar , milk products , meat products , eggs , nuts , citric fruit , other fruit , margarine , Aspartame , etc...
Different people react to different foods.