High bisphenol A (BPA) exposure may be linked to heart disease, according to recently release data from the National Health and Nutrition Examination Survey (NHANES). The survey evaluated 1,493 people ages 18 to 74 from 2005-2006 and found that higher BPA concentrations in urine were associated with an increased number of coronary heart disease cases, supporting findings from a study conducted by Peninsula Medical School and the University of Exeter last year. However, there is no substantial evidence as to why this correlation exists, and opponents say the information doesn't establish a cause-and-effect relationship between BPA exposure and heart disease. Still, the chemical has previously been linked to infertility, weight gain, behavioral changes, early onset puberty, prostate and breast cancers, and diabetes. Check out BPA in most food cans for more about the dangers of the chemical, where it is, and how to avoid it.