Stevia is a sugar substitute made from the leaves of the stevia plant. It’s about 100 to 300 times sweeter than table sugar, but it has no carbohydrates, calories, or artificial ingredients. Not everyone likes the way it tastes. Some people find it bitter, but others think stevia tastes like menthol. Stevia is natural, unlike other sugar substitutes. It’s made from a leaf related to popular garden flowers like asters and chrysanthemums.