Call for anyone with Hypoglycemia who successfully fasted

If there is anyone out there who has/had hypoglycemia, who successfully made it through some kind of a fast. How did you do it? How did you prep, so as to not get hypo during the fast?
(If you're not sure if you have hypyglycemia, you don't have it - people who have it nearly fall on the floor from low blood Sugar - completely different from what other people feel when hungry)