All natural, zero calories. SweetLeaf liquid stevia with all natural flavors is convenient and easy to use. As a supplement, add nutritious stevia to water, tea, coffee, milk, sparkling water, protein shakes, plain yogurt or anything else you can imagine. Zero carbohydrates. Zero glycemic index. (This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease).