圣达生物：公司维生素产品包括生物素、叶酸等

Group 1 - The company, Shengda Bio, has a range of vitamin products including biotin and folic acid [2] - For raw material supply, the company primarily procures folic acid production materials through purchasing methods [2] - The company adopts a centralized procurement model for bulk raw materials to ensure high quality and stability of supply [2]