Your first couple of fast days will likely be hard. But it does get easier. You will obviously feel hungry, but the hunger will come in waves and won’t get worse. The feeling of hunger will pass. If it really gets bad, have some tea, coffee, drink some water or vegetable stock. You may also experience headaches, feel slightly shaky or have a weird feeling in your stomach. Some people get irritable and grumpy and others don’t sleep too well on the fast night, leaving them to feel a bit washed out the next. After a while, as your body adjusts to the fasts, you won’t have all too many side effects anymore.