Fat-free salad dressing won’t give you as many carotenoids (a type of antioxidant) as a dressing with some oil, a study has shown.
Carotenoids have been linked with a reduced risk of diseases such as cancer and macular degeneration. The best thing to do? Add a teaspoon of canola or olive oil-based dressing to your salad. This is the ideal amount to give you a carotenoid boost, without adding too much extra energy.