Dr. Otto Warburg, a German Physiologist, was a 1931 Nobel Laureate, for his work with cancer treatment. His theory was that cancer and most diseases are anaerobic (they cannot thrive in an oxygen environment). Oxygen to the cells results from ingesting alkaline forming foods which are primariy most vegetables and fruit (to include vitamins, minerals and herbs).
Some vitamins and supplements deserve a bit more attention here:
Recommendations WCRF
WCRF glossary
Food & nutrition
Health Survey USA 2007
Science orthodox treatments
Health effects of fungi
Controversy Colloidal Silver
Silver Hydrosol Valuable Role