Add a burst of goodness to your day! Swanson Immunity Assist with C is an immune-supporting drink mix in a juicy citrus flavor. Get a potent serving of vitamin C with extra help from vitamin D, zinc and more to optimize immune function. A premier nutrient for immune health, vitamin C encourages the production and activity of white blood cells. Immunity Assist with C delivers 1,000 mg of this important antioxidant vitamin per serving. While vitamins A and D are better known for supporting vision and bone health respectively, but vitamin A also plays a role in the development and function of the immune system while vitamin D keeps the immune system primed and ready for action. Swanson Immunity Assist with C also features the essential mineral zinc which is needed for the development and function of immune cells, as well as important minerals selenium, manganese and chromium, all carefully selected for their roles in supporting healthy immune system function.