Raw red propolis found in beehives along the coast and mangroves in the Northeast region contains two substances with anti-cancer properties. In laboratory tests, they considerably reduced the proliferation of ovarian, breast, and brain cancer cells.

In a study published in the Journal of Natural Products, researchers at the Universities of São Paulo (USP) and Campinas (UNICAMP) report their discovery of the two anti-cancer substances as well as six novel polyphenols with structures previously unknown to science.

Polyphenols are beneficial natural compounds with anti-oxidant properties. They include flavonoids and tannins, and can be found in plants, cereals, and wine.