Zhejiang Tianrui Chemical Co., Ltd., founded in 2005, is a high-tech enterprise specializing in the research, development, production, and sale of amino acids, chelate salts, and complex amino acids. The company is renowned for its L-Theanine and glutamic acid series products and is one of the largest producers of L-Theanine in China. With certifications like FSSC 22000, GMP, HACCP, Kosher, Halal, and FDA GRAS, Tianrui Chemical exports to over 30 countries and serves industries like food, pharmaceuticals, and cosmetics.