I was diagnosed 2011, and went dairy free in October 2011. It is now easy... and why now I wonder why do we drink the milk of another animal, when all other mammals only give milk to their own infants to give them a "boost' of growth.... do we really want to promote new growth (cancer) as we are adults?... just my dairy-free thoughts!
I have also given up red meat too... it is a personal choice, but at diagnosis T3B, Gleeson 8 and PSA 41, I am now PSA 0.1after 4 years, so I am thinking I perhaps had good treatment, and also made good life-style decisions......
But, of course, it is unproven, and a personal choice.
I repeat... it is really a personal choice! Good Luck!