The incidence of autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD) has greatly increased over the last few decades. The reasons are largely unknown, although environmental factors are believed to be important. According to a new study published in the public access journal PLOS ONE by researchers at Rowan-Virtua School of Osteopathic Medicine and Rutgers University-New Jersey Medical School, Newark, children with ASD and ADHD often have a reduced ability to clear the common plastic additive, bisphenol A (BPA), from their bodies, thereby increasing their exposure to BPA.