To share and ask for thoughts

I wrote this group a couple of months ago about my brother, Mark, and I just need to share and ask for your thoughts. In a nutshell, Mark has been fighting colon cancer over three years. He had surgeries and chemo treatments, and yet there are cancer spoots in his rectum, lung, liver, lymph nodes, and abdomen. Within the last months he has been in two clinical trials. The first did no good (grew 25%) and the second has ravaged his body. This was a treatment that was to go in cycles of 4 weeks and the third week Mark went into the hospital after days of vomitting, dehydrated, falling, and slurred speech. The doctor told him he was the first patient to stay on it this long and wanted him to finish the 4th week. Mark and his wife went to his orginal oncologist today because they were feeling that this doctor was asking him to continue the trial even though it might kill him. She did tell him to stop the treatment. Mark is going on disabililty and will take the next month to rest and try to gain back the weight he has lost. An MRI will be done of his brain and a sonogram of his kidneys. I am asking those of you that know for your thoughts on how best to support my brother. I did get input from Emily in this group and a couple of others about alternatives, and Mark did make an appointment with an immunologist recommended by Patrick Quillen, author of Beating Cancer With Diet. But he cancelled the appointment because he was just starting up the second clinical trial and was feeling overwhelmed I think. When I see him tomorrow, I would like to suggest that he reschedule that appointment, if only to get guidance on a diet protocal to help him feel better and recover. (Inside I hope that maybe he could even find out new ways to fight this.) Is this something I should do? Mark told me last night that he's not ready to give up. I would appreciate any thoughts anyone might have. Thank you