I'm a bit distressed to see some comments on here about nutrition. I was told by a GP (who was re-training as a dietician/nutritionist) that food/diet should always be the FIRST TREATMENT for any illness. I've made it my business to read all the information and research I can (and I do have a Diploma in nutrition, for what worth) and as far as I know there is no basis for saying meat and dairy are life-threatening. Quite the opposite. Full fat milk is much better for the absorption of calcium and other nutrients. It's all about moderation and quality. Refined sugar, on the other hand, is life-threatening in excess, as are most processed foods. Those of us who grew up in the 1950s are fortunate because we were given certain basic food supplements (cod liver oil - ugh!) and the food we had was good quality with fewer additives.
Insisting on everything being 'evidence-based' merely plays into the hands of those vested interests (food and drug companies) who can afford the research (which they then tweak, if possible, to further their ends). There is a place here for intuition and good old common-sense. Have a diet with plenty of fresh vegetables, fruit, carefully-sourced meat and fish, free-range eggs etc. - oh, and get fresh air, exercise and plenty of sleep. Unfortunately too many people can only afford junk food, resulting in a downward spiral for their health. But if you can afford to eat well and are fit enough to walk 10,000 steps a day, do it.