Yoghurt Yuja can direct activate the immune cell rather than Vitamin C work as secondary to protect immune cell from being damage by free radical. The more active immune cell , the more healthy the person. Immune cell work as soldier or police in your body. When intruders like virus or bacteria enter into body, active immune cell will kill the virus or bacteria. Let imagine, the immune cells are not active or lazy so the virus or bacteria will not be kill by immune cell and they can multiply in high quantities. As a result Yoghurt Yuja best choice to boost immunity.