A food supplement. Do not exceed the recommended dose, as too much vitamin C can upset the stomach, too much zinc over time can lower copper, and too much vitamin D can raise blood calcium. Effervescent tablets contain sodium. Take care on a low-salt diet or with high blood pressure. Take a couple of hours apart from certain antibiotics. If pregnant, breastfeeding or on medicines, ask first. Store in a cool, dry place. This product information is for general guidance only and does not replace professional medical advice. Keep out of reach of children.