Immunity Max Elderberry C contains anthocyanins, known to have antioxidant properties. Among berries, elderberries have about 3 times the amount of anthocyanins as compared to red raspberries and 6 times the amount of anthocyanins as compared to strawberries. Vitamin C is also a known antioxidant and is shown to help support the immune system. Zinc is another key immune support nutrient. The immune system relies on zinc for the normal development and function of immune cells. Zinc is also required for certain antioxidant enzymes and protects cells from susceptibility to oxidative damage.