Some promising new research shows that marijuana use could have beneficial effects on certain types of cancer.
From the NORML blog:
For some 35 years the United States federal government has been well aware  that cannabis possesses potent anti-cancer  and anti-tumor properties . And for the past three years, government-funded researchers have speculated that these qualities may offer “protective ” effects against the onset of various types of cancer in humans, including lung cancer .
Yet to date, virtually no investigators have taken the time to assess marijuana’s potential anti-cancer effects in humans — until now.
In a clinical abstract just published online on the Cancer Prevention Research website, a team of U.S. investigators report that marijuana use, even long-term, is associated with a “significantly reduced risk” of head and neck squamous cell carcinoma.