As the leader of scientific research in the granule herb industry and the world's largest manufacturer, a national laboratory was established to conduct all the product quality testing and research by TianJiang. To ensure the safety and quality of the products, every batch of the herbs include bulk order herbs comes with the product's Certificate of Analysis (COA) from the national lab. Certificates of Analysis provided for every batch include: Authentication, Heavy-metal, Pesticide Residue, and Microbiological Analysis.
TianJiang National Lab is Certified by ilac MRA and CNAS with ISO/IEC Standard
Example of COAs