Religious fasting for only a day or so won't hurt your chances of sticking to this WOE or do major harm. You might enjoy the detox. Be sure to drink plenty of water to stay hydrated, and bring along something LC to have the next day. You might be so hungry if you don't have something onhand, you will eat the first thingoffered LC or not. Make sure it's something that's not to heavy on your stomach or hard to digest as you may need to ease back into eating alittle. I don't think just one day would have that much of an effect on digestion though.