Its almost too simple to do.
Stop eating and drink only water according to thirst for the duration on the fast.
Distilled water is preferred.
People highly toxic should clean up their diet for a while beforehand.
Especially those that have been duped by the medical profession and took their drugs religiously because the doctor says so. Those are highly toxic bodies.
For those people it would also be a good idea to start out doing one day fasts as described by Paul Bragg in his book -- The Miracle of Fasting.
The next less stage of toxic bodies would probably be the "fast fooders".
Those that have been duped by the fast food industry into believing they are eating something called food at these establishments.
All others its a go.
Just drink water and don't complicate it by doing otherwise.
Its almost too simple.
Sometimes the challenge of it is the simplicity of it.