Research has established that many nutrients play an integral role in the functioning of the immune system. The immune system is made up of special cells, proteins, tissues, and organs. The immune system helps to defend against germs and microorganisms. In most cases, the immune system does a great job of keeping people healthy and preventing infections, but sometimes problems with the immune system can lead to illness and infection. Solgar has combined six key nutrients in one potent formula. Each capsule contains Beta 1,3 Glucans, Ester-C, Elderberry and blueberry extract, Zinc, Selenium and Vitamin D. This unique formula may help to support the immune system by providing essential nutrients.