Water, water and more water. You should be aiming to drink 2 litres of water and/or herbal teas a day. It is important to keep well hydrated as thirst can often be mistaken by the body as hunger. Choose still water over sparkling water, and avoid coffee, alcohol and soft drinks at all costs. These drinks would defeat the whole purpose of fasting and we hope that you have the strength to resist for the duration of your fast.