Marmc, My response is pretty much the same as David's, but my first thought is that, if it were me, I would probably participate. Of course I would do just what you're doing first - asking questions and doing research. Have they discussed possible side effects of taking it? How is he doing/healing since treatment ended? As long as it doesn't make him feel sick or weak, etc, then I would think that the possible benefits greatly outweigh any reason I personally would have to refuse. I also await Brian's input on this. Lani