Hun, I don't know if you read stuff about intermittent fast before. Here you have some links that can be helpfull. Short fasts can be usefull but only if done right
I'll post links from hot people because diet wise I only follow the guru's who look hot, being the proof that what they say works
Brad Pilon - Eat Stop Eat:
Brad Pilon's Blog - Eat Stop Eat, Intermittent Fasting, Nutrition, Fasting and the art of losing weight and building muscle. - This is about intermittent fasting and he talks about fasting once a week for 24 hours. His videos on youtube are very usefull:
YouTube - Kanal von bradpilon
There are also other intermittent fasting programs like JUDDD (Dr. James Johnson) and Warrior Diet (Ori Hofmeckler).
From the three, I give more credit to Brad Pillon because he's really healthy looking and has more videos proving what he says. Ori is looks fine too, but his diet is about eating once a day and it sounds more like a daily binge at one single meal. Dr. Jonhson, well he doesn't look that good and I once tried his diet and only lasted one week
Hope that helped
x