2. The main ingredients of mayonnaise account for at least 70% of the total weight of vegetable oil and egg yolk, and the types of oil are optional. The ingredients are mustard mustard and lemon juice. Actually, white vinegar is also very good. Of course, salt and pepper are indispensable. White pepper is used here to indicate the same color. Industrial mayonnaise will add more spices and shape-keeping stabilizers, such as natural gum and modified starch. In terms of nutritional value, industrial products have lower calorie value because they add a lot of ingredients, although the fragrance is not as good as homemade ones.