Cabbage is a leafy green, red, or white biennial plant grown as an annual vegetable crop for its dense-leaved heads. It is descended from the wild cabbage, and belongs to the "cole crops" or brassicas, meaning it is closely related to broccoli and cauliflower; Brussels sprouts; and Savoy cabbage. 

In fact, just 1 cup (89 grams) of raw green cabbage contains:

• Calories: 22
• Protein: 1 gram
• Fiber: 2 grams
• Vitamin K: 85% of the RDI
• Vitamin C: 54% of the RDI
• Folate: 10% of the RDI
• Manganese: 7% of the RDI
• Vitamin B6: 6% of the RDI
• Calcium: 4% of the RDI
• Potassium: 4% of the RDI
• Magnesium: 3% of the RDI