Marijuana's incredible medical potential becomes increasingly clear with every new study:

Raymond DuBois and colleagues at the University of Texas in Houston discovered that a key receptor for cannabinoids, which are found in marijuana, is turned off in most types of human colon cancer.

Without this receptor, a protein called survivin, which stops cells from dying, increases unchecked and causes tumour growth.

To better understand the role that the receptor, called CB1, plays in cancer progression, the researchers manipulated its expression in mice that had been genetically engineered to spontaneously develop colon tumours.

"When we knocked out the receptor, the number of tumors went up dramatically," says DuBois. Alternatively, when mice with normal CB1 receptors were treated with a cannabinoid compound, their tumours shrank. [New Scientist]

The body of evidence showing that THC may effectively treat tumors is already extensive, so there's nothing particularly surprising about this latest research. Rather, it provides yet another opportunity to point out just how much damage our government has done in the course of its relentless and fraudulent campaign to convince everyone that the marijuana plant is incredibly dangerous rather than incredibly helpful.

Imagine what we might have achieved if our nation's efforts over the past thirty years had been focused on identifying the plant's benefits rather than exaggerating its harms and vilifying its users.