Tonking Biotech is an ISO certified factory, we offer various range of plant extract powders, our featured product are including: Green tea extract, Panax ginseng extract, Milk thistle extract, Citrus aurantium extract, Grape seed extract, Ginkgo biloba extract, Echinacea extract, Goji berry extract, Magnolia bark extract, Epimedium extract, Tribulus extract, Pomegranate extract, Siberian ginseng extract, Saw palmetto extract, Maca extract, Tongkat ali extract, Marigold extract, Stevia extract, Luo han guo extract, Hesperidin, Narigin, marigold flower extract etc.