The bad side to drug and cancer research is that companies will only fund research and trials if they can patent it. The patent game in any kind of tech is quite rediculous, lots of misspent focus. At least drug patents do expire, but we still see a lot of research wasted on just trying to reformulate and extend with a new patent.
The time from discovery to market is about 14 years for recent cancer therapies. Sure we need safety and rigorous science but 14 years smells to me like a nice little barier to entry for existing treatments and companies to hide behind.
The above two issues aren't conspiracies, they are systemic problems.
DCA has had to fund a lot of their research out of direct donations, and I feel it deserves more than this. At least the safety of it has been previously established and doctors will not lose their license for treating with it off label. there is a clinic in Ontario doing this.
http://www.medicorcancer.com/dca-therapy.html