Zhejiang Tianrui Chemical Co., Ltd. is the largest and professional manufacturer at L-Theanine in China., where is located at South Economical Development Zone of Longyou County, Zhejiang Province, China. Our Tianrui Chemistry has production, baking and packing workshops in line with GMP standards and its own lab with advanced instruments such as: Liquid chromatography etc. For testing to ensure product quality. And we have obtained KOSHER and Halal Certification.

Through couple of years cooperation with a well-known chemical research institute in China, the company has adopted biosynthesis approach to produce L-Theanine, which has reduced cost substantially. Its products enjoy a decent competitive advantage at price. We have build effective&logical producing&managing system, which lead us to strictly comply with ISO9001, GMP system. Ascribed to the strict quality control, the products are being distributed in Europe, North America and Southeast Asia and have won a good reputation both at home and abroad. The test by an authoritative department concluded that our L-Theanine has completely met the standard of JP2000.

"Customer First, Quality First and Creditability First" has been our consistent objective and we are sincere and warm welcome to cooperate with old and new customers both from home and abroad.