The active substance is potassium citrate (3g).
The other ingredients are mannitol (E421), citric acid (anhydrous), aspartame (E951), natural flavouring cranberry type 14666: maltodextrin, Natural Flavouring Substances, Flavouring Preparations (including natural cranberry juice concentrate), silicon dioxide (E551), carmine (E120) and triacetin (E1518).