EU officials concluded that, following a three-year investigation, there was no evidence to prove the previously undisputed fact.
Producers of bottled water are now forbidden by law from making the claim and will face a two-year jail sentence if they defy the edict, which comes into force in the UK next month.
German professors Dr Andreas Hahn and Dr Moritz Hagenmeyer, who advise food manufacturers on how to advertise their products, asked the European Commission if the claim could be made on labels.
They compiled what they assumed was an uncontroversial statement in order to test new laws which allow products to claim they can reduce the risk of disease, subject to EU approval.
They applied for the right to state that “regular consumption of significant amounts of water can reduce the risk of development of dehydration” as well as preventing a decrease in performance.
However, last February, the European Food Standards Authority (EFSA) refused to approve the statement.
A meeting of 21 scientists in Parma, Italy, concluded that reduced water content in the body was a symptom of dehydration and not something that drinking water could subsequently control.
Now the EFSA verdict has been turned into an EU directive which was issued on Wednesday.
This is nuts.
Ukip MEP Paul Nuttall said the ruling made the “bendy banana law”* look “positively sane”.
He said: “I had to read this four or five times before I believed it. It is a perfect example of what Brussels does best. Spend three years, with 20 separate pieces of correspondence before summoning 21 professors to Parma where they decide with great solemnity that drinking water cannot be sold as a way to combat dehydration.
*I couldn’t not look this up. Apparently in 2008 a law was passed by these same folks (and subsequently repealed) that regulated the maximum curvature of bananas that could be commercially sold, and said that cucumbers had to be straight.