I too try to avoid doctors at all costs and try to live healthily but for me the important thing is to read proper scientific research with an enquiring and questioning mind. Couple this with understanding what your body requires and it will tell you this by means of making your life uncomfortable with indigestion, constipation, headaches, skin reactions, obesity etc. I wouldn't say I have got it right I still have weight to lose but I also wouldn't say I foist it on anybody else unless of course you come to stay and I just serve up the same food which is very simple lots of fresh food, fruit and veg, low fat almost no salt (we are both treated for hypertension) more chicken and fish than red meat, miniscule processed meat (the occasional bit of bacon) wouldn't waste my money on organic produce, alchohol in moderation laughing in great quantities.
Have a lovely day.