Quite a number of vegetarian friends who take only organic food up lorry in mid-50s. They don't smoke, drink and can run a mile faster than most school boys. Interestingly 2 have pancreatic cancer - it appears to be the no. 1 killer of those who live healthily. Than came across this John Hopkin report posted in SB on breakdown of immune system leading to cancer. No one knows the nutrients needed tobuild and maintain our immune system. Advice given in the report was to take everything but in moderation. Sound logical to me as I think health conscious chaps limit their diet scope and may end up lacking certain essential substances for the immune system, found in "unhealthy" food.