Key points from article :
2 drinks a day shortens life expectancy by up to two years.
More than 3 drinks a day could lose five years of your life.
5 to 10 drinks a week could shorten their lives by six months.
UK government guidelines say less than six pints of beer per week.
Did not find an increased risk of death for lighter drinkers.
Reduced risk of heart disease wiped out by a higher risk of other illness.
Lancet study of 600,000 alcohol drinkers in 19 countries.
