We specialized in this field for almost 10 years with:1. Sweetener (Stevia Extract, Luohanguo Extract) 2. Chiese Herb Extract (Milk Thistle Extract, Resveratrol, Artemisinin, Citrus Aurantium Extract, Tribulus Extract,Gingko Extract)3. Anthocyanidins (European Bilberry, Chinese Blueberry, Purple Sweet Potato, Black Soybean, Grape Seed)4. Polyphenols (Apple, Pomegranate, Magosteen, Grape, Green Tea, Black Tea)All products are from the plant with GMP certificate or HACCP certified production line, and under very strict quality control. More details please visit our homepage, all samples available for test.