I did not do any research, but I'd like to contribute with my experience. I fast every year for 30 days, the fast starts at dawn and finishes at dusk. I eat breakfast, usually an egg wih some soda bread, and then an evening meal - fruit salad as a starter, then some rice with chicken. It's a great detox if you are hooked on caffeine (like i am for most of the year), since you don't want to drink coffee, and each year I lose about 10lb without doing much exercise, energy levels are up and my skin clears up.
You have to make sure you drink at least 2L of water (64oz) and don't continue on this regime for more than a month.
Muna 30 5'3''
Currently LCHF and loving it!
It is foolish to keep doing the same things and expect different results.