Stevia Liquid Concentrate is made from the whole leaves, and is concentrated in a base of purified water. Stevia is a white-flowered herb native to Paraguay. Its use by indigenous cultures dates back more than 400 years and it is an integral part of the Paraguayan diet. Its primary constituents, known as steviosides, are found predominantly in the leaves. Stevia Liquid Concentrate is made from the whole leaves and is concentrated in a base of purified water for convenient use.