One cup of zucchini has about 35 calories. It contains about 340 milligrams of potassium, 530 International Units of vitamin A and 70 milligrams of phosphorus.

The daily recommendation for women over age 20 for vitamin A is 4,000 International Units, and 800 milligrams of phosphorus. There are no recommendations for potassium. However, one cup of tomato juice has 535 milligrams of potassium, a cup of strawberries has about 250, a banana has 450 and a slice of honeydew has 350.

Zucchini is a good source of fiber with 4 grams per cup. Be sure to include the peel to get all the fiber. Adults should get 20-30 grams of dietary fiber from their daily diet.

Remember the calories will be higher if you add cheese, oil, butter, bread crumbs or fry the zucchini.