Stevia is an extract from plant stevia and is recognized as the safest natural sweetener in the international food industry. The only drawback of stevioside is that there is an unpleasant sense of metal residue in the mouth after eating. Rebaudioside A (REB A) is one of the ingredients of stevioside, stevioside and rebaudioside A taste a lot better. Rebaudioside D (REB D) is found in most close to sucrose taste ingredients, and the taste is no longer a problem. Recently more and more customers are searching RD products, we can provide pure RD, RA&RD mixture etc after long time research.