I've just read that if you drink lots of water for 1 week you can lose a dress size. First 4 days you drink 4 to 5 litres of water throughout the day Apparently it's what body builders, fighters and models all do. You have to drink the water through the day staggered as drinking it in one go could kill you. Day 5 you just drink 1.5 to 2 litres and day 6 just 1.5 litres. It says if you a health problem to speak to your doctor first. Would this be suitable for a Hypo?