Zhejiang Weishi Biotechnology Co., Ltd., established in 2005, is a leader in the development and production of vitamins and nutritional additives. Specializing in microencapsulation technology, Weishi produces a wide range of fat-soluble vitamins (A, D3, E, K), unsaturated fatty acids like DHA and ARA, and other nutritional supplements. They have state-of-the-art manufacturing facilities with certifications like GMP, HACCP, FSSC, and HALAL. In 2016, the company expanded its production of vitamin D3 through their acquisition and integration of Jiangxi Jirui Biotechnology Co.