Walden Farms Mayo has great taste, but no calories or fat. How do we do it? Walden farms use rich natural flavors to create Walden Farms New Calorie Free Flavored Mayo's. They are made the Walden way with no calories, no fat, no carbohydrates, no gluten or sugars of any kind and are a delicious alternative to high calorie, high fat mayos. Use in preparing all your favorites like tuna, egg, chicken, macaroni or potato salads for great taste that are almost calorie free.