A study done in Naples, Italy, by the Journal of Pharmacology and Experimental Therapeutics show compounds in marijuana inhibit growth of cancer cells in animals and in culture on a wide range of tumoral cell lines.

Those cell lines include human breast carcinoma cells, human prostate carcimona cells, and human colectoral carcinoma cells. During the study investigators assessed the anti-cancer activity of various non-psychoactive cannabinoids.

Cannabidiol (CBD), cannabigerol (CBG), and cannabichromine (CBC) where all shown to inhibit cancer growth. CBG and CBC also possess anti-tumor properties. “These results suggest the use in cancer therapy for cannabidiol,” investigators concluded.