Proanthocyanin Content in Cranberry CE Medicinal Products

The CE marking is a statutory marking for certain products sold within the European Economic Area. Medicinal products with a CE label are not regulated by the European Medicines Agency but are licensed according to the directives of the European Community. We have analysed the proanthocyanin (PAC) content of four cranberry CE products by both a photometric (DMAC method using 4-dimethylamino-cinnamic-aldehyde as colouring reagent) and a high-performance liquid chromatography assay and have compared the daily dosages recommended for the products by their manufacturers with benchmark doses obtained from the literature. For all CE products, the identified DMAC values for the PAC content per unit were below those declared. For two of the CE medicinal products, not even the manufacturers' maximum daily dosages have type A PAC contents that would have any chance of providing the health benefits promised on the product information sheets; the other two might have some chance, but only at maximum dosage (nine capsules per day for one of them). CE medicinal products should be better controlled by regulatory authorities to prevent consumers from buying and taking doses that are inadequate to provide the benefits claimed. Copyright (c) 2014 John Wiley & Sons, Ltd.