Hydration dehydration cycles Hydration dehydration cycles We should drink fluids based on our food intake and activity level. On average drink 70 ml water with each chapati (or equivalent rice) that one eats. So a person eating 2 chapatis should drink only 150 ml. Food intake should be 3 to 4 Rotis or equivalent in each meal for an average person. Take small sips of water after every few bites....