emergen-c 1000mg vitamin c powder, with antioxidants, b vitamins and electrolytes, vitamin c supplements for immune support, caffeine free fizzy drink mix, tangerine flavor, 0.33 ounce (pack of 30) emergen-c emergen-c's tangerine flavored vitamin c dietary supplements provide essential nutrients designed to boost your immune system, energy level and electrolytes. in each one of the 30 flavored fizzy drink mix packets, there are 1,000 mg. of vitamin c plus other antioxidants zinc and manganese to help you ward off illnesses. there are also seven b vitamins, which provide a natural way to boost your energy and it is a good way to replenish your electrolytes after a hard workout.