I have a saying "everything is known to cause cancer in california, best not to live there". There are tonnes of everyday products that carry this legal disclaimer.

Two quick cut and pastes from google searches:

California's Proposition 65, also called the Safe Drinking Water and Toxic Enforcement Act, was enacted in 1986. It is intended to help Californians make informed decisions about protecting themselves from chemicals known to cause cancer, birth defects, or other reproductive harm.

Take Coke and Pepsi, for example. Manufacturers recently changed their caramel coloring to avoid the Prop 65 label even though the FDA had said before the changes it would take more than 1,000 cans of pop a day to reach doses shown to lead to cancer in mice.