New European regulations demand that "health foods" come up with scientific evidence to back their labelling. This will effect many products including multi-vitamins and slimming pills to margarine and yoghurt.
I agree, its about time manufacturer's were made to provide scientific evidence or remove these claims from their products altogether. Some in the past have side-stepped such pressure by using words such as 'may' or 'could', hopefully now such cunning measures are nearing the end.