How do beet greens compare with other dark leafy greens with regards to nutritional value?

Dark green leafy vegetables (DGLV) are often lumped together as a group and treated interchangeably. However, up-to-date nutrient information reveals important differences between members of this incredibly nutrient-rich food group. For example, ...

from The World's Healthiest Foods http://ift.tt/1XcVTgM