Many people don’t know that their Zinc and Copper levels must be in balance for optimal health. This product does that for the consumer wanting to take a Zinc supplement to support immune function. Most people don’t know this unless they have some sort of healthcare or medical background. Good product when taken as directed. You shouldn’t be taking just Zinc alone for extended periods of time or you risk depleting you Copper levels. This is a great trace mineral supplement to ensure proper balance. I have used Jarrow Formulas before and trust their products for my needs.