Isab gol clings to fat. If you put it in yoghurt, youll notice that its clings to the yoghurt too. Leave it in yoghurt for about ten mins and youll see. Thats what it does to food in your stomache.... clings and transports it down to the other end (toilet!)
Laxatives are meant for short term use! They also cause kidney stones and failure if used frequently! I know because there was someone in Pakistan who had stones just because he used isabghol on a daily basis. It also drains your body of salt and minerals! Avoid what is not needed!