"By now most Canadians are familiar with bisphenol A or BPA, a chemical still widely used in food containers that many worry might present a health risk. Several studies have noted that BPA can mimic the hormone estrogen and have linked it to a number of health problems, from cancer, to obesity and even diabetes. The concerns about BPA compelled Canada and several other countries to ban its use in baby bottles. That ban has led to a new market for BPA-free plastic bottles. But what do we know about the replacement chemicals that are used in BPA-free plastics? A number of studies suggest many BPA-free plastics substitutes may be no better than BPA."