Effervescent tablets allow for fast absorption of nutrients into the bloodstream. Both vitamin C and zinc contribute to the normal function of the immune system, as well as the protection of cells from oxidative stress. Directions: Take one tablet daily dissolved in a glass of water. Ingredients: Citric acid E330, Foaming Agent: Sodium Bicarbonate E500, Ascorbic acid, Sweetener: Sorbitol E420, Sweetener: Mannitol E421, Zinc Gluconate, Colour: Beta Carotene E160a, Sweetener: Aspartame E951, Flavours: Orange & Grapefruit, Sweetener: Saccharin E954. Contains Phenylalanine. Advisory Information: Keep out of reach of children. Store in a cool, dry place. Do not use if seal under cap is broken or missing. Always read the label.Holland and Barrett