A toxin is any substance that is harmful to your body. Many of these are naturally occur as byproducts of plants, bacteria, and some wildlife, while others are produced from chemical substances, synthetics, artificial foods, and other by-products that can contaminate the environment. Toxins are also produced naturally within the human body during metabolism, such as converting oxygen to carbon dioxide while breathing. Toxins can also be absorbed into the body through air, water, and food. Just as toxins are different, our body’s response to them can be different as well. This may be due to many factors, such as the amount of toxicity, the duration of exposure, as well as the nature or susceptibility of the person.