Below is a link to the Prop 65 listed chemicals. Many chemicals on the list are naturally occurring and existed before the mankind even knew what a chemical was. Others are bad, very bad.
https://oehha.ca.gov/media/downloads/proposition-65//p65chemicalslistsinglelisttable2021p.pdf
Some common cooking oils are listed:
Emissions from high-temperature
unrefined rapeseed oil
cancer
That is canola oil.
Most lawyers in the field will tell you to put a prop 65 label on any manufactured item that may find it’s way into Kalifornia. Like everything else in Kalifornia this list is heavily influenced by politics and legal actions.
I buy many herbs in pound bags as I make my own herb formulas for myself and others. Some of the herbs have the CA “evil toxin” warning on them. Herbs that have been used for millenia for healing and treating many conditions. CA is insane. Of course some things are toxic for real, but they dilute the message by labelling harmless and benefit herbs as toxic.