Drinking a pint of beer may lower your life expectancy by the same amount as smoking a cigarette – new research

Angela Wood, University of Cambridge and Ellie Paige, Australian National University

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Earlier research has suggested that drinking moderate amounts of alcohol may lower a person’s risk of heart disease. However, our latest study challenges these findings. Our study shows that the more alcohol a person drinks, the higher their risk of stroke, fatal aneurysm, heart failure and early death. Drinking in excess could take up to five years off your life-expectancy.

Although drinking alcohol has been linked with higher risks of liver disease and some cancers, the relationship with heart disease is more complex. Several studies have shown that both not drinking any alcohol and drinking high amounts of alcohol are linked to a higher risk of heart disease, but moderate drinking appears to be cardio-protective. This has led to the commonly held belief that drinking in moderation can be good for the heart.

To further complicate matters, different countries have different recommended safe levels of drinking and different definitions of a standard drink. The UK’s chief medical officer recommends that both men and women should limit their alcohol intake to no more than 14 units of alcohol per week, which is around six or seven pints of average strength beer, or six or seven glasses of average strength wine. Recommendations are more relaxed in other countries. In the US and Italy, the upper safe drinking limits for men are around twice that in the UK.

Our research compared the health and drinking habits of more than 600,000 drinkers in 19 countries worldwide and controlled for differences between people, such as gender, diseases (including diabetes) and lifestyle (such as smoking).

We found the upper safe limit of drinking was about the equivalent of five pints of average strength beer or five glasses of average strength wine per week. Drinking above this limit was linked with lower life expectancy. For example, drinking ten or more drinks per week was linked with one to two years shorter life expectancy. Pro rata, that is about 15-30 minutes of life lost per drink, equivalent to the effects of smoking a cigarette. Having 18 drinks or more per week was linked with four to five years shorter life expectancy.

‘Benefit’ outweighed by risks

To get a fuller picture, our study looked at the effects of drinking alcohol on many different types of heart disease whereas most previous studies typically focused on single types. As shown in previous studies, people who drank moderate amounts of alcohol were less likely to have a non-fatal heart attack, compared with those who drank low amounts. We believe this effect may be related to HDL cholesterol (so-called “good cholesterol”), which increases with alcohol consumption. However, our results suggest that this “benefit” is outweighed by higher risks of stroke, heart disease, heart failure and death from any cause.

Effects of alcohol were worse for beer and spirit drinkers, compared with those drinking wine, and for binge drinkers, compared with those who drink the same amount more evenly over the course of a week.

For good health, it’s best to consistently drink a little less on most occasions, or skip alcohol altogether. When you do drink, try to space it out over the week, rather than drinking several alcoholic drinks in a day. Drinking less alcohol may not only help lower your risk of several heart conditions, but could help extend your overall health and life.

Angela Wood, Senior Lecturer in Biostatistics, University of Cambridge and Ellie Paige, Research Fellow, Australian National University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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