You may want to consider buying organic produce, particularly if you're pregnant, breastfeeding or purchasing food for young children. While the long-term health consequences of conventional pesticides are still undergoing research, a study published in 2010 in the journal "Pediatrics" found that children with higher pesticide levels in their urine were more likely to be diagnosed with attention-deficit/hyperactivity disorder. Eating a variety of fresh vegetables -- organic or not -- is the most important consideration. The vitamins, minerals and antioxidants in vegetables are an essential aspect of any healthy diet