Dongying Zuoning Biotechnology Co., Ltd.

Dongying Zuoning Biotechnology makes finished health foods, foods for special dietary use and ordinary foods under contract for other brands, rather than selling ingredients of its own manufacture. The L-carnitine listed here is one of the materials it formulates with.

The company started in 2014 at Dongying in Shandong, at the mouth of the Yellow River, and has run contract manufacturing for more than ten years. It reports four industrial parks, production sites covering close to a thousand mu and more than two thousand staff, and it has made products for Beijing Tongrentang, Renhe, 21 Jinweita and Baiyunshan.