Natural flavors are used as an ingredient in Truvia Calorie-Free Sweetener and Truvia Liquid Sweeteners. Like pepper, salt or any other spice that would be used to heighten the taste of food, natural flavors are used to bring out the best in Truvia Calorie-Free Sweetener and Truvia Liquid Sweeteners. While we can’t share what our natural flavors are, we can share they are derived from natural sources.