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Eur J Clin Nutr. 1999 Oct;53(10):776-80.

The 'Green Keyhole' revisited: nutritional knowledge may influence food selection.

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  • 1Department of Internal Medicine, Sahlgrenska University Hospital, Göteborg, Sweden.



The food-marking symbol the 'Green Keyhole' has been in use since 1989 in Sweden, to make it easier for consumers to select low-fat and high-fibre alternatives.


To describe knowledge of the Green Keyhole symbol in a general population of both sexes and the association between knowledge and intake of Green Keyhole labelled foods.


A cross-sectional study within the GOT-MONICA project 1995/96.


732 males and 859 females, aged 25-64 y.


Reported intakes of Green Keyhole labelled low-fat and fibre-enriched foods from a food frequency questionnaire, in relation to knowledge of the Green Keyhole symbol.


53% and 76% of the males and females, respectively, understood the meaning of the symbol. SUBJECTS with knowledge were significantly younger (P<0.0001) and (among women) thinner (P=0.0105), than those without knowledge. Intakes of Green Keyhole labelled low-fat foods were significantly higher in males (P=0.0443) and females (P<0.0001) with knowledge of the symbol than without. An interaction between education and knowledge of the Green Keyhole symbol was found for intake of low-fat marked foods (P=0.0088).


Both males and females with knowledge of the symbol seem to have adopted its low-fat message. However, in certain sub-groups, particularly the less educated, the message of the symbol appears to have no association with dietary practices.

[PubMed - indexed for MEDLINE]
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