Zinc gluconate is prepared through a chemical reaction between zinc oxide or zinc carbonate and gluconic acid. Gluconic acid is typically produced through the fermentation of glucose by certain strains of bacteria, such as Gluconobacter.The fermentation process converts glucose into gluconic acid.

Zinc oxide (ZnO) or zinc carbonate (ZnCO3) is used as the source of zinc for the reaction. It is dissolved in water to form a solution.

The zinc oxide or zinc carbonate solution is combined with the gluconic acid solution.The two solutions are mixed and allowed to react under controlled conditions.This reaction forms zinc gluconate.

After the reaction, the resulting solution is usually filtered by us to remove any solid impurities or unreacted materials. Filtration helps obtain a clear and purified zinc gluconate solution.

The filtrate containing zinc gluconate is concentrated using techniques like evaporation or membrane filtration to remove excess water and increase the concentration of the compound.  The concentrated solution is then dried to obtain a solid form of zinc gluconate, typically as a powder or granules.

The dried zinc gluconate is usually packaged in appropriate containers, such as sealed bags or airtight containers, to protect it from moisture and contamination.Proper labeling with relevant information, such as product details, batch or lot number, and expiration date, is also applied.  The product is stored in a dry and cool environment to maintain its stability and quality.