There have been small clinical trials of DCA conducted already. That data is out. They were not compelling enough to warrant the type of investment you are talking about (multi-year clinical trials).
That's not to say it may not be found effective for some types of cancers in the future. But what it does tell us is that the lack of interest in spending more money on r&d is not some conspiracy by pharma because they can't make money on it, rather, it's because the data just hasn't been that impressive so far.
That's not to say it may not be found effective for some types of cancers in the future. But what it does tell us is that the lack of interest in spending more money on r&d is not some conspiracy by pharma because they can't make money on it, rather, it's because the data just hasn't been that impressive so far.