Earlier today I finished a 72 hours dry fast and decided to eat a big meal. Not a full blown meal like OMAD which aims to fill all the micronutrient into a single sitting, but a big respectful meal.
Well 2 hours afterwards, or ever less, I had a super quick 1 shot diarrhea which ended in 20 seconds. My guess is that the dry fast, which was a hard dry fast for the most of it, cleared my digestive system, and basically all the food that I did eat was wasted, with an additional microbiom damaged to the intestine. I also want to note that I was once in the restroom on the second day of the fast, thus I assume that my intestines were mostly cleared while eating the post-fast meal.
Avoid stupid mistakes, for your safety! Even if I felt well the whole fast and during the meal, you don’t want that 1 minute of diarrhea and stomach pain.
Yes, start slow. Sip on water, preferably with a little bit of salt or electrolytes, not too much though, over the course of a few hours before moving on to more nutritious things and eventually solids. Though 3 days is pretty much at the verge of where i don’t do that anymore. Anything longer than 3 days I’m careful, anything less i usually don’t have to be taking it too slow
I just finished a 76 hr dry fast. Broke it by sipping water, then had a really big bowl of vegetable soup. I brought it to a boil to kill off any bacteria. No digestion issues. Also drank electrolytes with it (potassium to balance out the sodium in the soup).
You should specify what was in the meal. Did it have meat in, raw vegetables, large amounts of fat, or dairy? All of those can be tough on the digestive system at first.