Chemopreventive and Chemotherapeu…ents: A Mini-review.

This review of existing research found that propolis — a waxy substance made by bees — shows promise in lab and animal studies for slowing growth of certain cancers (oral, gastrointestinal, skin melanoma, breast, and prostate). The compound works through multiple mechanisms like triggering cell death and reducing inflammation. However, the authors emphasize that most evidence comes from lab studies, not human trials, so we can't yet say propolis is an effective cancer treatment on its own.