Asparagus
Asparagus is another low-calorie flowering vegetable that is available in white, green, and purple varieties. All varieties of asparagus are healthy and nutritious but purple asparagus contains compounds known as anthocyanins that might aid in preventing heart diseases. One cup which is 134 grams of asparagus provides only 27 kcals of energy and is rich in folate and vitamin K providing 17% and 70% of the DVs respectively.