Have you heard of BPA or PVC? These compounds are found often in the packaging our food comes in for example in cans, plastic bottles and plastic wrap. According to Perrine, these compounds easily get into our bloodstreams, and, like pesticides, can disrupt our hormonal systems and lead to weight gain. So how do you reduce your exposure to these harmful chemicals? Perrine offers great advice in “The New American Diet : Don’t heat plastic in the microwave; buy foods in glass jars or boxes rather than cans if possible, and use plastic bottles once and then recycle them.