When you start fasting...
Be mindful that there are some things hiding deep down that food, and in particular sugar, served as a cover up for. Make sure you're isolated. Preferably in nature. Because the worst in you will come out. In the midst of purging it, you may unintentionally hurt people you care about. Confusion and chaos will boil up and try to wreck your life. That's why solitude is so important here. Only you will fully understand what's going on with, well, you.