What is 'natural' and 'organic' may not necessarily be good for you:
"Nonetheless, in resisting many things that I view as "unnatural"—nuclear weapons, global warming, chemical pollution, habitat destruction—while also honoring, respecting, defending, admiring, and nearly worshiping many things that are natural (sometimes just because they are natural), it is all too easy to get carried away, to forget that much in the world of nature is unpleasant, indeed odious. Consider typhoid, cholera, polio, plague, and HIV: What can be more natural than viruses or bacteria, composed as they are of proteins, nucleic acids, carbohydrates, and the like? Do you object to vaccination? You'd probably object even more to smallpox."