A duck egg's calorie content comes from a mix of protein, fats and carbohydrates. Each egg contains 9 grams of quality protein, which your body can use to support your immune system and maintain healthy skin. This makes up roughly 15 percent of the daily protein intake for an average 150-pound person, according to guidelines published by the Iowa State University Extension. A duck egg also contains 9.6 grams of fat -- a concentrated source of energy -- as well as 1 gram of carbohydrates.
Duck eggs boost your vitamin intake and provide considerable amounts of vitamins A and B-12. The vitamin A from your diet promotes new cell development to keep your tissues healthy and also maintains good eyesight. The vitamin B-12 in duck eggs keeps your nerves healthy and promotes red blood cell function. Each duck egg boasts 3.8 micrograms of vitamin B-12, more than your entire daily recommended B-12 intake.