Changsha Vigorous-tech Co., Ltd . is a manufacturer and distributorof Botanical Extract, Located in Changsha, Hunan. we are abiological high-tech enterprise with independent Imp. & Exp.Statue. The main products we can provide include four series and over 200varieties such as Tea Extracts, Herbal Extracts, Rare MushroomExtracts as well as Fruit and Vegetable Extracts.As specifications for botanical extracts become more demanding, wehave leapt to the forefront by testing every lot. All extracts aretested in-house, random extracts are tested by authoritativeanalytical labs. Every sample is accompanied by a standardspecification sheet, every order with a signed certificate ofanalysis ...