Been doing this as well. Not for weights reasons. But man do I feel the difference in focus and general well being. Also tried a 3 day water fast. A bit hard but also felt really good during the second day.
Had a UC flare, after that I adjusted my diet. About 50% of the time I do 18h of fasting. Tried an 3 day water fast, gonna do this maybe every 2 months. Mostly meat free meals, cooked from scratch. Trying to keep sugar and bread to the weekends. Eating fermented vegetables and kombucha with most meals. Additional vitamins when I remember.