since what's being targeted is the concentrated extract, not the plant or its juice.

Nor would I worry about the golden seal except the dried and powdered root, again a concentrate.

in the extract of the whole leaf.

The California law is very strict.

as smokers do to the Surgeon General's warning. By Prop 65's standards, practically everything causes cancer, so the warnings are everywhere. Kind of like the boy who cried wolf.

The Proposition 65 listing is limited to Aloe vera, non-decolorized whole leaf extract. This is an unprocessed form of Aloe vera that is not typically used in consumer products. The processed form of Aloe vera typically used in consumer products is not covered by the listing. This means those products would not require a Proposition 65 warning and would not be subject to public or private enforcement actions. The listing is based on an identification by the World Health Organization's International Agency for Research on Cancer (IARC) and required by California law and regulations. Regarding Proposition 65 warnings, we have proposed changes to the warning system. If approved, future warnings would name the specific chemical that prompted the warning and would refer consumers to a new website for additional information on the health effects of the chemical and ways to reduce or eliminate exposure to it.

-- California Office of Environmental Health Hazard Assessment.