Pure Feet uses fully natural ingredients and does not include any chemicals. It only aims to draw toxins out of the body and nothing will be ingested in your body. Pure Feet foot pads will not bring any side effects unless you are allergic to one or more of the ingredients.
People who are allergic to shellfish should use with caution, the product contains Chitosan (made by treating the chitin shells of shrimp and other crustaceans with an alkaline substance)
Pure Feet foot pads are tested and certified safe. It has a FDA lab certificate for non detectable heavy metal and has a ISO 9001 certification for quality.