Close to 107 million u.s. adults have cholesterol levels of 200 mg/dl or higher, a level that the american heart association says increases the risk of heart disease and stroke. at least 12 million among the most powerful veggies are the dark green, leafy variety, such as spinach, kale, collard greens and swiss chard.http://www.fightcholesterol.org/200701173/diets/10-top-foods-t