Keto Chow does not contain rice or soy protein. These tend to have high levels of lead and trigger a proposition 65 cancer warning.
Some flavors of Keto Chow do have plant-based spices, like cinnamon and cocoa powder. They contain enough lead to trigger a “reproductive harm” proposition 65 warning (if you consume 1000 times the amount it can cause birth defects). You can get more details about Keto Chow and heavy metal levels on this page.