Before we get to the remaining five foods on the list of the 10 most healthful foods that we probably don’t eat, but definitely should, let’s review the first five: cabbage, beets, guava, Swiss chard, and cinnamon. We learned that cabbage boosts our production of sulforaphane, which is a powerful cancer-fighter; beets reduce the level of artery-damaging homocysteine in our blood; guavas are the best source of lycopene, which is key to maintaining prostate health; Swiss chard contains powerful carotenoids, which help keep your retinas young; and cinnamon helps to stabilize your blood sugar.