This ominous warning label is required by California for all products and produce made within the state. California has the strictest heavy metal testing in the world. Even some of the produce (kale, spinach, etc.) at local grocery stores must bear the Prop 65 warning. In essence, the label lets consumers know a product comes from the soil and that soil may contain traces of chemicals or heavy metals. But as you know, Organifi blends undergo strict and rigorous third-party testing to ensure these chemicals and heavy metals never make it into the ingredients or finished blends.