Principle health Immune+ Effervescent Vitamin C is a healthy way to increase your immunity. It contains two of the most important immune boosting nutrients. Vitamin C helps maintain a healthy immune system, has antioxidant properties that protect cells from oxidative stress, helps maintain the normal function of the immune system during and after intense physical exercise and reduces tiredness and fatigue. It is also involved in the synthesis of collagen which is required for the healthy skin, gums, teeth, blood vessels, cartilage and bones, reduction of tiredness and fatigue. Zinc helps maintain a healthy immune system, normalizes acid-base metabolism, metabolism of fatty acids, carbohydrate metabolism, protein synthesis and metabolism of vitamin A. It also aids in cognitive function, maintenance of healthy and normal bones and vision.