This widely used additive in plastic containers and cans has long been suspected of contributing to hormonal disruptions and neural development issues in children. More recent studies have begun to look at the health effects of BPA in adults -- in 2009, researchers at the University of Exeter in the United Kingdom found that adults with high levels of BPA in their urine had a significantly higher risk of developing heart disease and suffering from impaired liver function. Despite these dangers, more than 90 percent of the American population has detectable levels of BPA in their bloodstreams. To minimize your exposure, avoid plastic water bottles, discard any plastic containers that have scratches, and don’t microwave or place hot liquids or food in plastic containers. Because BPA is also found in the lining of cans, consider cooking with dried beans and frozen vegetables instead of their canned counterparts.