This is a question that is on a lot of peoples mind. After all organic foods are more expensive and one might wonders if it makes a difference.
A recent study in Environmental Health Perspective would indicate that organic foods are better for you. In the study, they looked at 23 children (age 3-11) living in Seattle, Washington. The children consumed a diet for five days in which most of their usual foods were substituted with organic food. Urine samples showed the median urinary concentrations of the specific metabolites for the organophosphorus pesticides malathion and chlorpyrifos decreased to undetectable levels immediately after the introduction of organic diets and remained undetectable until the normal diets were reintroduced.
Consumption of organic foods appears to result in rapid clearance of recently consumed pesticides from the blood. Long-term use of such a diet would also presumably aid in the gradual removal of pesticides stored in organs and adipose tissue.