What made me feel better was toast and tea. I'm not suggesting that they're prostate-cancer cures; just that they were the first food I was able to make for myself in the patient lounge after 3 months in hospital, once I was allowed to transfer from bed to wheelchair unsupervised, and they represented a major turning point in independence and my ability to eat again. They still make me feel good every morning.

I don't deny that there are strong links between what we eat and how we feel (and how well we recover); the problem comes when a person assumes that everyone else will have the same experience they had. I think it's fantastic that you felt better after you stopped eating red meat, for example, but someone experiencing ADT-induced anemia might have exactly the opposite experience if it causes their iron to drop further.