Has human anatomy changed? No, but food has changed a lot. Foods that were healthy 50 years ago may not necessarily be healthy in 2010.
Today, according to Stephen Perrine, author of "New American Diet," we have all sorts of chemicals in our foods, pesticides, growth hormones, antibiotics, and plastic pollutants, to name a few. He says they aren't good for the environment, they aren't good for our bodies, and they also cause you to be overweight.
Perrine says certain toxins in your food can contribute to weight issues and obesity. The chemicals that disrupt the function of our hormonal system are called obesogens. Obesogens can cause heart disease, diabetes, obesity, and high cholesterol. These chemicals are found in many of the most popular foods we eat and enter our body through a variety of sources: natural compounds found in soy products, artificial hormones fed to the animals we consume, plastic pollutants in some food packaging, chemicals added to processed foods, and pesticides sprayed on our produce.