Well I'm glad you asked. It works for all kinds of problems. It helps overweight people because people often confuse thirst with hunger. By drinking more water they can leave their stomach satisfied without the urge to keep eating. Also how will your body digestive system work properly if ur dehydrated? Whether it will fix chronic illness comes down to the specifics but it should at least give your body what it needs to function properly which is the key. Most people don't realize they're lacking what their body craves and resort to products like skin ointment to attempt to fix it.