Obviously it is an arbitrary number, which is also problematic as I have absolutely no idea of what damage years and years of high alcohol consumption could wreak... What moderate intake really is, is very difficult to judge, particularly as high alcohol intake is very normalised by the culture in the UK, for example
I guess my point with the previous post is that the recommended alcohol limits are SO out of kilter with everyday reality (particularly the daily limit), that they become almost meaningless (whereas five portions of fruit and veg a day, while high, is an achievable target to build into one's life). How many (youngish) people in the UK never have two drinks at one sitting during the week? Only those who don't drink at all, I'd suspect.
I'm not sure i agree here. The national guideline is by definition the best general recommendation for the public as a whole - it can't take into account men who are huge and can metabolise more alcohol than others and vice versa, so by definition it's the best estimate for the public at large, it's not arbitrary (though there are dissenting voices as the the best estimate, as evidenced by the limit decreasing over time in the UK and big discrepancies across Europe.)
I think there is a bit of a misconception about alcohol harms for many people (not saying this is you and Tea) where it's a polarise situation of danger drinkers/alcoholics making up the reckless 5% who become ill and need loads of treatment and cost the taxpayers lots of money and then 'everyone else' - the 95%, who are healthy and may drink a bit or a lot but are ok.
But for public health people of course it's all on a scale, and for them shifting the drinking habits of people in the middle of that scale (people like us, i drink similar amounts to what people here have been saying) down a bit is just as valuable as shifting down the people at the extreme end, if not more so, because there are so so many people in that middle section. I do think as a society we underestimate the damage that sitting in the middle of this scale can do - because alcohol is all around us, because it tastes great, our mates do it etc. We are numbed to its toxic effects because it's so so embedded in our lives.
I've got a few stats to hand from doing stuff at work on alcohol that may be interesting..
• 1.6 million people have mild, moderate or severe alcohol dependence (Home Office. Drug strategy 2010: reducing demand, restricting supply, building recovery: supporting people to live a drug-free life 2010)
Average unit consumption is actually quite low.
• In 2009, men drank, on average, 15.6 units of alcohol a week; women drank 9.5 units a week– both within the NHS guidelines (Demos, Under the influence: Taking a look at binge drinking behind the headlines… 2011.)
• Excessive alcohol consumption (twice the recommended daily allowance in a single episode) in the UK has been decreasing since 2005, and more quickly among 16-24 year olds, falling from 39 per cent in 1998 to 30 per cent in 2008, and by a similar amount among underage drinkers (Demos, Under the influence: Taking a look at binge drinking behind the headlines… 2011.)
• 21% of Londoners are reported to be drinking to harmful or hazardous levels. 5% (approximately 370 000 people) of adult Londoners are dependent drinkers compared to 3.6 % of adults across the whole of England (Greater London Authority. London: the Highs and Lows 2: A report from the Greater London Alcohol and Drug Alliance 2007)