Every once in a while a study pops up on the National Library of Medicine's bibliographic database known as MEDLINE that not only confirms the therapeutic relevance of natural substances in cancer treatment, but blows the conventional approach out of the water.

Published in 2007 in the journal Planta Medica, researchers found that an enzyme extracted from pineapple stems known as bromelain was superior to the chemo-agent 5-fluorauracil in treating cancer in the animal model. The researchers stated:

"This antitumoral effect [bromelain] was superior to that of 5-FU [5-fluorouracil], whose survival index was approximately 263 %, relative to the untreated control." [view entire study]