what qualifies as dark leafy greens?
Cruciferous Leafy Greens. Kale, mustard greens, collard greens, cabbage and broccoli are cruciferous leafy greens. Cruciferous vegetables are high in nutrients and contain glucosinolates, which inhibit the growth of certain cancers. Magnesium and tryptophan are also abundant in these greens; these minerals enhance heart health and brain function.