Your fast begins after the last bite goes in your mouth.
I like to start late in the day, so I can begin a refeed in the evening. IE this week I’m doing 5 days so I started Sunday at 4:30 and ending 4:30 on Friday.
Set up an account on one of the Fasting apps so you can pop in and see how far you’ve come along, track weight changes, etc.
Stock up on water and have some himalayan salt on hand.
Remove all trigger food candy sweets out of the house if you can or out of your sight.
That’s a long fast, so prepare to dig your heels in. You may feel beat up the first 3-4 days but it will pass and you will live. Did you feel that on your 10 day fast? Was it a clean fast?
Have a water at your side at all times.
Check your calendar for any social events that may get in the way.
For every 2 days fasting you’ll want to tack on one day refeed - and that menu is a whole other ball of wax.
Research refeed and have a plan for it when the fast ends.
Don’t worry about working out. Let the fast do its thing.
Maybe you should start later today? You’ll get to sleep through some of the first hours 