No guarantee that naturally occurring extracts are safe. Try ricin or aflatoxin, or how about extracts from the lovely tobacco plant. As far as health disclaimers, it is impossible to fully investigate toxicological properties because there is no definition for what "fully" means, and what's fully today will not be fully tomorrow. (Or maybe it's just folly?) Anyway, anything you buy will have as many disclaimers as they can think up to help reduce liability exposure from claims which may have absolutely no causal basis. Mosquito extract isn't that safe either so pick your poison.