I suffer from bulimia and am having weekly blood tests to check my pottasium levels. A normal level is between 3.5 and 7. If you are bulimic you must get your pottasium levels checked by a Doctor as it is very dangerous if it gets too low. Mine dropped to 2.2, I needed to go in to hospital and have an IV drip which brought my levels back up, however this is only temporary, so I need to take pottsium ssupplements to increase the store in my body. Please do see a Doctor if you are concerned, there is nothing to be embarrased about, they will not put you under pressure but it is definitely not something worth risking.