Could PCBs Help Boost Blood Pressure?
http://www.nlm.nih.gov/medlineplus/news/fullstory_101218.html
http://www.nlm.nih.gov/medlineplus/news/fullstory_101218.html
"People in an Alabama city who had higher levels of the chemicals known as PCBs in their bodies were much more likely to have high blood pressure, a recent study found, but it's not clear if the PCBs actually caused their hypertension."