Asparagus, low in saturated fat and very low in cholesterol comes from the edible stem of a plant. It is also related to onions, garlic and leeks. Although there is a wide variety of asparagus, surprisingly, only a handful of them are edible and provide health benefits. They can be harvested in three colours, mainly, white, purple and green. Nutrients ...... yes, they are a good source of vitamin K, folate and vitamin C.