The importance of psychosomatic illnesses and the physical manifestation of disease resulting from mental imbalances/ catalysts cannot be stressed enough. If there is anything I have learned over the past year, it is the importance of the 'emotional diet'. If you feed yourself constant negative rhetoric, your body is going to provide feedback in that direction. The 'emotional diet', as it were, is just as important, if not more, than the 'physical diet'.
If you wish to be healthy no amount of good diet will do this for you. Work on your self and your thoughts, especially those pertaining to the 'negative' spectrum (Anger, hate, depression, confusion etc). Often (almost always) there is a 'mental' equivalent/ causation which has initiated the physical illness. I look at folk in my life and common physical issues they may harbour, and pretty much 'know' what has caused it. Upon query they are perplexed as to how I 'knew' they had an issue in a certain area.
If anyone reading is having a certain issue simply plugging in 'metaphysical causes of <your illness here>' will bring about common analogs relating to body feedback and mental catalyst. This is a basic list:
http://www.kekmadar.com/heal/a.htmlOnce you address the mental equivalent you'll find the body has no need to 'get your attention' in such a strong manner, and the symptoms will subside/heal. Many of us are out of touch with our unconscious and subconscious mind which is why these things tend to manifest physically, rather than people working on themselves when the issues first arise. You'll be much better off, and the tools leveraged through analytical psychology and 'shadow work', as it were, are invaluable for life.
That's not to say a good diet is not important, because it is. It is a given that feeding your body crap may cause issues (Not always, belief/thought overrides). Good quality organic nutrition with some meat (for some individuals who require such a source for protein). Often the issue with a bad diet actually stems from covering up/numbing any emotional issues they have, so again it's all about working on those and having a love for your body, rather than something that must be 'tamed'. It is you and is a part of you, a partner for life. Treat it/you with love and respect it/you deserve.