Per www.jointogether.org .... "The BBC reported Aug. 1 that Nick Sheron, a University of Southampton researcher and member of the Alcohol Health Alliance UK, said that the daily limits of three to four units of alcohol for men and two to three units for women lacked solid scientific backing and are confusing to the public. He recommended that the U.K. return to the former practice of weekly recommended alcohol consumption limits -- 21 units for men and 14 for women."

Of course it is confusing. The better answer is to not drink recreational alcohol at all. TO say 1 or 2 drinks is OK is like saying half a spoon of rat poison is OK. Why not recommend zero?