Zinc is an essential micronutrient that plays an important role in health. Zinc participates in enzyme activity, cell division and body development, immune function, taste regulation, and appetite. However, up to 70% of Vietnamese children under 5 years old are zinc deficient because their diet does not provide enough zinc for the body. Zinc deficiency has been shown to hinder mental and physical development in children, reduce immune response, increase the risk of infections, delay puberty, stunt height growth, and cause poor appetite.