A single cup of raw kale (about 67 grams or 2.4 ounces) contains (1):
Vitamin A: 206% of the RDA (from beta-carotene).
Vitamin K: 684% of the RDA.
Vitamin C: 134% of the RDA.
Vitamin B6: 9% of the RDA.
Manganese: 26% of the RDA.
Calcium: 9% of the RDA.
Copper: 10% of the RDA.
Potassium: 9% of the RDA.
Magnesium: 6% of the RDA.
Then it contains 3% or more of the RDA for Vitamin B1 (Thiamin), Vitamin B2 (Riboflavin), Vitamin B3 (Niacin), Iron and Phosphorus.
This is coming with a total of 33 calories, 6 grams of carbs (2 of which are fiber) and 3 grams of protein.
Kale contains very little fat, but a large portion of the fat in it is the omega-3 fatty acid called alpha linolenic acid.
Given the incredibly low calorie content, kale is among the most nutrient dense foods in existence. Eating more kale is a great way to dramatically increase the total nutrient content of your diet.
Glad of that because I eat lots of kale and collard greens. Both together have been amounting to over a bunch per day for me. I like the brassica plants. I have brussel sprouts, cabbage, broccoli, cabage sprouts, kale and collard greens in my refrigerator. I basically buy as many of brassica varieties as I can get at reduced price.