Reality TV star Bethenny Frankel’s Skinnygirl Margarita was recently yanked from the shelves of Whole Foods markets for purportedly having a non-natural preservative thought to be sodium benzoate.

Sodium benzoate is used as a preservative to prevent food from molding. It's added to a wide variety of foods, including mayonnaise, margarine, carbonated drinks, jams and jellies, sauces, and tomato ...