Zinc plays a role in producing and digesting proteins. Zinc is also important in maintaining normal blood levels of vitamin a, boosting the immune system, healing wounds, converting calories to energy, reducing low birth rates and infant mortality, controlling blood cholesterol levels, and in producing the prostaglandin hormones that regulate heart rate, blood pressure, inflammation, and other processes.
This metal is important in a number of key activities, ranging from protein and carbohydrate metabolism to the immune system, wound healing, growth and vision.
Severe deficiency can contribute to stunted growth. Deficiency can sometimes be seen in white spots on the fingernails.