Immune support* Vitamin D *Contributes to the normal function of the immune system Contributes to the maintenance of normal bones, teeth and muscle function When we're in sunlight, our bodies naturally produce vitamin D - which contributes to the normal function of the immune system. These fizzy effervescents are like a bit of sunshine on your tongue and provide a daily dose of 25 µg of vitamin D; a tasty way to lift your vitamin D intake!