Tapeworms are good for you. Or so claims Japanese parasitologist Koichiro Fujita.
After studying healthy yet parasite-infested children in Borneo, he was so
convinced that the intestinal parasites have a positive symbiotic function that
he introduced one into his own gut. Oddly enough, he is not having an easy time
of selling his message to a broader public. (Though maybe tapeworm therapy
will ultimately take its rightful place alongside trepanation and urine therapy.)