Per the Federal Trade Commission News Release:
Under the terms of the settlement [announced in December, 2010], the company 
has “…agreed to stop claiming that Activia relieves temporary irregularity, unless the representation is non-misleading and the ad conveys that eating three servings a day is required to obtain the benefit, or unless Dannon has competent and reliable scientific evidence that the benefit can be achieved from eating less than three servings a day …[the company has also]… agreed to stop claiming that DanActive or any yogurt, dairy drink, or probiotic food helps people avoid catching colds or the flu, unless the claim is approved by the Food and Drug Administration…”
What other food or drink products make claims that do not withstand scientific scrutiny?