Cannabis, and the cannabinoid compounds found within it, has been shown through a large amount of scientific, peer-reviewed research to be effective at treating a wide variety of cancers, ranging from brain cancer to colon cancer. Below is a list of over 60 studies that demonstrate the vast anti-cancer properties of cannabis.

Studies showing cannabis may combat brain cancer:

Cannabidiol (CBD) inhibits the proliferation and invasion in U87-MG and T98G glioma cells. Study published in the Public Library of Science journal in October 2013.
Tetrahydrocannabinol (THC) can kill cancer cells by causing them to self-digest. Study published in the Journal of Clinical Investigation in September 2013.