n vegetables have the highest nutrient density of all foods. They give you the most nutrients (vitamins, minerals, antioxidants…) per calorie of food. These nutrients will help protect your body from just about everything from colds to cancer. The general rule for green vegetables is the darker the green, the more health benefits it contains. So foods like Spinach, Kale and Collards Greens will contain more healthy compounds than a lighter colored vegetable like Lettuce. There may be a link between those who don’t have many dark leafy greens in their diet and an increase in the risk for developing colon polyps.