Stevia - approved for use as a food supplement in the US in 1995, I believe. It's a south American herb which is estimated to be 30 times sweeter than cane sugar. In crystalline form, it is approx. 300 times sweeter than sugar. It has apparently been used by the Guarani Indians of Paraguay for centuries. One website is http://www.healthfree.com/stevlif.htm Legal or not? Chris