Zheiiang Weishi Biotechnology Co., Ltd.

Zhejiang Weishi Biotechnology Co., Ltd. was founded in 2005 and is headquartered at Wuzhen in Tongxiang, Zhejiang Province. It produces and sells fat-soluble vitamins, covering vitamins A, D2, D3, E, K1 and K2, including a vegan D3 grade. Forms include oils, powders and microparticles.

The company's original contribution was double-encapsulated microcapsule powders of food-grade vitamins A, D3, E and K1, which had not previously been made in China. In 2016 it took over Jiangxi Jirui Biotechnology Co., Ltd., which gave it the full production chain for vitamin D3 from raw material through to finished ingredient.

A subsidiary, Zhejiang Binuohua Health Technology Co., Ltd., also at Wuzhen, makes direct-compression granules and coated dosage forms of vitamin C, B vitamins and other nutrients, with design capacity of 800 million to 1 billion tablets and 400 to 600 million capsules a year. Certifications held across the group include GMP, HACCP, ISO 9001, ISO 22000, FAMI-QS, kosher and halal.