Almost every creature on the planet has toxins floating round in their system. In 2008/2009 the Centre for Disease Control (CDC) tested the umbilical cords of new-born babies and found traces of over 280 harmful chemicals. As adults, the levels of toxins in our bodies are significantly higher.
In an ideal world, our liver and kidneys would be able to get rid of most harmful substances. Unfortunately, our bodies are now overloaded, not just through pollution of our environments, but also increased stress levels.