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Question
Posted by: S | 2012/10/09

Light beer

Hi DietDoc,
I read an article recently saying that light beer contains fewer kJ''s than white wine. Do you agree with this?

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Our expert says:
Expert ImageDietDoc

Dear S
It all depends on how many kJ the 'light beer' contains and what volume you drink per day. The SA Food Tables do not list different types of beer, so you would have to check on the label of the beer to see how many kJ it contains per 100 ml. However, let's compare the energy content of the alcoholic drinks that are listed in the SA Food Tables: Standard beer with an alcohol content of 3,6% w/w contains 172 kJ, while the Tables indicate that white wine with an alcohol content of 9,4% w/w contains 300 kJ per 100 ml. If you therefore drink only 100 ml of standard beer and 100 ml of white wine then the wine will provide 128 kJ more than the standard beer. But if you drink your usualy 300 ml (standard beer glass) of beer, then you will be ingesting 172 x 300 = 516 kJ which would be more energy than a 150 ml glass of wine which contains 450 kJ. Presumably 'light beer' does contain fewer kJ than standard beer, so the statement that light beer contains fewer kJ than white wine is correct. But always remember that the volume of these drinks that you consume, is as important as their kJ content. Alcohol contains 29 kJ per gram.
Click on 'Diet & Nutrition' at the top of this page and then do a search for articles on 'alcohol' and the energy content of a variety of alcoholic drinks.
Best regards
DietDoc

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Our users say:
Posted by: DietDoc | 2012/10/10

Dear S
It all depends on how many kJ the 'light beer' contains and what volume you drink per day. The SA Food Tables do not list different types of beer, so you would have to check on the label of the beer to see how many kJ it contains per 100 ml. However, let's compare the energy content of the alcoholic drinks that are listed in the SA Food Tables: Standard beer with an alcohol content of 3,6% w/w contains 172 kJ, while the Tables indicate that white wine with an alcohol content of 9,4% w/w contains 300 kJ per 100 ml. If you therefore drink only 100 ml of standard beer and 100 ml of white wine then the wine will provide 128 kJ more than the standard beer. But if you drink your usualy 300 ml (standard beer glass) of beer, then you will be ingesting 172 x 300 = 516 kJ which would be more energy than a 150 ml glass of wine which contains 450 kJ. Presumably 'light beer' does contain fewer kJ than standard beer, so the statement that light beer contains fewer kJ than white wine is correct. But always remember that the volume of these drinks that you consume, is as important as their kJ content. Alcohol contains 29 kJ per gram.
Click on 'Diet & Nutrition' at the top of this page and then do a search for articles on 'alcohol' and the energy content of a variety of alcoholic drinks.
Best regards
DietDoc

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