Cancer Survivors Network

My boyfriend was diagnosed with non small cell lung cancer in April of last year. In November of last year he found out that it spread to his brain. I've been doing alot of research on supplements that may help him. I've found a few that sound promising. I was just wondering if anyone has tried anything that had any positive results? We don't have the money to buy alot of the things on the market since they're so expensive but I'm willing to give up anything to get something that might work. Any information would be greatly appreciated. My thoughts and prayers go out to everyone who is going through this or knows someone who is.
Thank you