What are the Dangers from Pesticides Exposure?• What you also need to understand is that toxins from pesticides can remain in the body and build up in the liver. And, even at "safe" levels your reactions can be mild to severe. High levels of exposure can be fatal.• How do you know if youre going to be ill? You dont; you just have to hope for the best.• How will you be affected? Well, you dont really know how you body will react to the toxins until it happens. Several factors determine how your body will react including your level of exposure, the type of chemical you ingest, and your individual resistance to the chemicals. Some people are unaffected or are mildly affected, while others become severely ill from similar levels of exposure.