Some plant-based spices, like cinnamon and cocoa powder, contain enough lead to trigger a “reproductive harm” proposition 65 warning (if you consume 1000 times the amount it can cause birth defects). The flavors of Keto Chow that contain these spices (along with any food product that contains these spices) are required to have a Prop 65 warning. You can get more details about Keto Chow and heavy metal levels on this page.