Onion salad dressing does not have much of a nutrition values, other then its energy in calories. It was intended to make salads taste better. It is ranked as Grade C in nutrition value chart.
Onion salad dressing (100g) has 250 calories (173 calories from fat). One serving of Onion salad dressing (3.5 oz / 100g) contains 19.2g total fat (2.8g saturated fat), 15mg cholesterol, 219mg sodium, 122mg potassium, 18.8g total carbohydrates (1.1g dietary fiber).
A Serving of onion salad dressing has 1.6g protein.