Which is our advantage?

Green stone is a professional manufacturer and exporter producing many kinds of herb extract and plant extract,After development for over ten years,we have formed 4-big advantage as follows:
   1. Herbs Source
   Our company is one of the representatives of The Herbal Materials Association of China who owns best herbal raw material source,ensuring the quality of raw materials. 
   2. Technical Support
   We maintain long-term cooperation with the Biology Research Institutes of the Science Academy of China, Beijing University, Zhejiang University, Najing University to ensure the quality and advanced technologies.
    3. Quality Control
   The contents of active ingredients must be inspected strictly by HPLC, GC and UV,ensuring the full contents.
   4. Quality Promotion
     Supercritical Extraction guarantees the purity.