Natural flavor with other natural flavor. Makes 10 quarts. No artificial sweeteners, flavors, or preservatives. 90% fewer calories than leading beverages. 5 calories per 1/8 packet. 1 packet makes 2 quarts. This product 5 calories; leading beverages 70 calories. Gluten free. Sweetened with sugar and stevia leaf extract. Color sourced from black tea. Flavor sourced from tea, lemon and other natural flavor. CrystalLight.com.