I love Dr. Fuhrman’s deffinition for many reasons, the foremost being that it is backed up by a truckload of research. The most nutrient dense foods on the planet are vegetables, and studies upon studies show that eating more vegetables = less obesity, diabetes, heart disease, stroke, cancer, autoimmune disease, and increased lifespan. All that, and not one study saying you can eat too many. Rather than citing a whole slew of research articles, I will list the links of my two favorite nutrition books, both of which offer this message and both of which list all the sources of their information:
Eat To Live by Dr. Fuhrman, M.D.
The China Study by Dr. T. Colin Campbell, Chair of Nutritional Sciences at Cornell University
Check them out. I highly recommend both books if you are interested in improving your health. In the meantime, be sure to eat plenty of Beans & Greens!