A Rapid Antioxidant Boost with Zinc, Vitamin C, Vitamin D, and Echinacea Protekt IMMUNITY liquid supplement beverage enhancer mixes seamlessly and delivers a high-impact natural burst of antioxidants, such as Vitamin D, zinc, echinacea, and vitamin C to support optimal health and immunity throughout the body.  Guard against external stressors, extreme conditions, and seasonal bugs to keep your immunity strong and body healthy. With delicious Mixed Berry natural flavor and zero sugar, calories or extra junk, it’s never been easier to support your body’s first line of defense.