If the dosage is small, you can buy it in the supermarket.

Carrefour, RT Mart

If you use more, you can go to the Tianqiao wholesale market and the food city by the Yellow River for wholesale.

Originally, there was a company specializing in wholesale of food additives and raw materials to the west at the entrance of Tianqiao East Yuan Meng Garden.

But now I don't know if there is any more.

Right between two country bars.