The drug called DCA in short has been used for decades in humans with some rare inherited diseases. When he added it to the water of mice and rats given humans cancer, the results surprised him. It shrunk brain, breast, and lung tumors in a matter of weeks. And the drug had no side effects confirmed by tests of DCA in humans for other diseases. And it seems to work by reviving the energy producing More.. components of human cells allowing the cells to work normally again, triggering cancer cells to commit suicide.