The argument that environmentalists and toxophobics bring out is that the human body has not evolved with the numerous synthetic chemicals around. Thus the human body either has a very difficult time processing them or does not get rid of them at all and therefore we are all cancer time bombs unless we switch to all natural and organic products. However, other sources say that the liver is already efficient at filtering substances, and that the immune system is equipped to handle "alien chemicals". And many natural chemicals can be just as bad. What do you guys think?