Phthalates may play a role in ADHD symptoms.

Phthalates may play a role in ADHD symptoms.
http://www.environmentalhealthnews.org/ehs/newscience/phthalates-may-have-a-role-in-adhd/

"Phthalate chemicals create the softer, more flexible plastics used in many consumer products. Recent research suggests that children exposed to phthalates have a softer ability to perform well in school, as evidenced by increased inattentive and hyperactive behavior."