Hi, I've only started today and visited my pharmacist this morning to join. She explained the diet to me and repeatedly said I would be required to intake a minimum of 2 litres of water and a maximum of 4 litres daily. She told me not to count the 250ml of water for each shake or soup but said that the water used to make coffee or tea or added further to the shakes should be accounted for up to the required 4 litres.