Zhejiang Tianrui Chemical CO,.Ltd. is the largest and professional L-Theanine manufacturer in China. Our company has production,drying and packing workshops,and specialized research and development (R&D) center of L-theanine in line with GMP standards. We have quality control lab with advanced equipments for testing to ensure product quality and have obtained KOSHER and Halal Certifications. 
    
    
    
    Through cooperation with a well-known chemical research institute in China, we have adopted a unique approach to produce L-Theanine and has reduced cost substantially to ensure that our customers have competitiveness in price.We build efficient and reasonable production & management systems, which lead us to strictly comply with food safety management system ISO22000 and GMP requirements of Good Manufacturing Practice. We have passed KOSHER、HALAL、HACCP、ISO22000、ISO14001 and other international certifications.Thanks to the strict quality control, the products are being distributed in Europe, North America and Southeast Asia and have enjoyed a good reputation both in China and abroad. The test by related Authorities concluded that our products completely meet the standard of the sixth version of Japan food additives Kimisada books.
    
    
    
    "Customer First,Quality and Credibility Foremost" has been our consistent purpose and we are sincere to cooperate with old and new customers home and abroad.