Great adviceyou want to eat things that won't irritate your stomach and easy to digest
melon is the best thing or tropical fruits that first day
homemade bone broth free of garlic/onions/spices is also excellent, but make sure its plain
i would also keep activated charcoal on hand for the diarhea if it comes.
then day 2 you can gradually bring in solid foods again as your digestive system starts to wake up. then by day 3 you can go back to normal diet
your digestive system is shutting down during a fast and usually takes 2-3 days. during that time the cells in your gut are refreshing and all so on the rest of your body there's a lot of things being repaired at the cellular level because your body isn't wasting energy digesting food. it also means your white blood cells are being recycled and autophagy is happening. cancer cells being zapped away. all around really good
You can buy ketone strips from the pharmacy and pee on them during your fast and you'll see you are peeing out a lot of ketones.. its a good tool to figure out how fast you are getting into ketosis. the more you fast, the quicker you will generally get into ketosis.