There are lots of books on the subject.
There is also a lot of information on this site - use the search engine above right click on search and enter the term you are looking for.
Try "Cracking the Metabolic Code" - James B La Valle
Dr Gaynor's Prevention Program
Smart Fats - M schmidt
If they are no in your local library they can be found second hand on the web
http://www.usedbooksearch.co.uk/
I'm afraid that many have yet to realise how great an impact our food intake has on body function.
The importance of omega three was even the subject of a continuing professional education module by medscape for doctors.
Because there are no definative answers the only way is no check it out for yourself.
It is my impression that at least a number of long term survivors on the site are concious of diet as part of their regeime.