You mean "detoxification" right, but don't you think like they say "iron cuts the iron or diamond the diamond" we will need some amount of poison to eliminate all the toxins and harmful chemicals that enter our food system including air and water? Just my few cents, yeah tofu is right choice, but it has its own problem prenatal feminization, and all mental sexual variations. Yeah smoking is right example, Mark Twin did rightly mentioed that "there is nothing much easier than to stop smoking, I have done it more than 200 times"