Zinc is essential for the maintenance of immune system strength and glandular health. It can be rapidly depleted when the body is fighting an illness such as cold and flu. Zinc is the tenth most abundant element in the human body. Zinc is found in all organs, tissues and cells, and is involved in the function and activation of over 200 enzymes. Enzymes are the unique essential proteins that make the human body function properly. Its vital role in maintaining proper immune system function and detoxification abilities has earned zinc its reputation as a cold and flu remedy. Zinc promotes immune system health by activating the production of white blood cells. These white blood cells form the basis of the immune system and destroy both damaged cells and invaders when antibodies recognize a specific antigen or foreign pathogen, such as a virus.