Zinc plays a critical role in immune function, healthy cell growth, and a healthy inflammatory response, so you want to make sure a zinc deficiency isn’t affecting your health.* Selenium is another mineral that may be just as important as zinc for healthy cells and overall health support.* However, when it comes to supplements, not all selenium supplements are the same. Because supplementing with any type of zinc can reduce your copper, an important micronutrient, we’ve added a very small amount of copper to our Zinc Plus Selenium.