Advice on the maximum units of alcohol that should be consumed was introduced in 1987 - 21 units in a week for men and 14 for women.
In 1995, the advice was changed to recommend that men did not regularly drink more than three to four units per day. The figures were two to three units for women. It also says that after heavy drinking people should leave 48 hours for the body to recover.
It said having two alcohol-free days would "would enforce the message that drinking every day should be avoided".
All well and good you might say, though I'm intelligent enough to feel I know what I'm drinking, when, and from experience have some understanding of the after effects as well

However no where in the Commons science and technology committee report do the committee -
Andrew Miller (Ellesmere Port and Neston)
Gavin Barwell (Croydon Central)
Gregg McClymont (Cumbernauld, Kilsyth and Kirkintilloch East)
Stephen McPartland (Stevenage)
Stephen Metcalfe (South Basildon and East Thurrock)
David Morris (Morecambe and Lunesdale)
Stephen Mosley (City of Chester)
Pamela Nash (Airdrie and Shotts)
Jonathan Reynolds (Stalybridge and Hyde)
Graham Stringer (Blackley and Broughton)
Roger Williams (Brecon and Radnorshire)
actually say whether
(a) they are personally undertaking/abiding by their own recommendation
(b) that they recommend that the 6th Floor, Despatch Box, Members Smoking Room, Strangers' Bar, Pugin Room Bar, or Terrace should cease serving drinks on the same 2 days each week to MPs, staff and guests
(By the way the overall subsidy provided for the Catering and Retail Service in the House of Commons was for the financial year ending 31 March 2011)
Personally when they start setting an example, then I might start listening more.
By the way if any of the above are your MP, you might wish to ask them if they 'practise what they preach'.