Sambucol Effervescent Tablets contain elderberry, Antivirin, Zinc and Vitamin C which work together to help maintain and strengthen your immune system. The effervescent tablets create a great tasting berry flavoured drink that is suitable for adults and children aged 4. Sambucol Effervescent Tablets are free from artificial colours, flavours, alcohol or gluten. Contains Elderberry Extract The tablets contain Elderberry Extract which is proven to be more beneficial to your health, as the antioxidants found in them help to support the immune system by helping neutralise the harmful effect of free radicals.