1. Get yourself to a doctor.

We do not recommend starting this diet without the supervision of doctor and before getting the necessary tests.   

Moskovitz also shares a warning: "While the diet may not be dangerous for everyone, I would not recommend this plan for anyone with diabetes as it can affect blood sugar medications. I would also not recommend this type of eating for intense exercisers either, especially on fasting days as it can be hard to sustain activity."