Swedish researchers report that antioxidants make cancers worse in mice. It’s already known that the antioxidant beta-carotene exacerbates lung cancers in humans. Not exactly what you’d expect given the extravagant — and incessant — claims you hear made about the miraculous effects of antioxidants.
In fact, they are either useless or harmful, conclude the editors of the prestigious Annals of Internal Medicine: “Beta-carotene, vitamin E and possibly high doses of vitamin A supplements are harmful.” Moreover, “other antioxidants, folic acid and B vitamins, and multivitamin and mineral supplements are ineffective for preventing mortality or morbidity due to major chronic diseases.” So useless are the supplements, write the editors, that we should stop wasting time even studying them: “Further large prevention trials are no longer justified.”
Such revisionism is a constant in medicine. When I was a child, tonsillectomies were routine. We now know that, except for certain indications, this is grossly unnecessary surgery. Not quite as harmful as that once-venerable staple, bloodletting (which probably killed George Washington), but equally mindless. Continue reading