How Much Frozen Spinach Equals Fresh Spinach?

A typical serving of spinach, which is about 3 ounces, is about 7 calories, assuming a person does not add butter, cheese or some other calorie-enriching additive to the vegetable. Spinach is fat-free. Spinach is also cholesterol free and very low in carbohydrates. Spinach comes in at zero on the glycemic scale. Spinach is a good source of niacin, zinc and dietary fiber. Spinach contains antioxidants and is also considered to be an effective anti-inflammatory.