Knowledge, Attitudes and Behaviours Related to Dietary Salt Intake in High-Income Countries: a Systematic Review

The purpose of this review was to examine the knowledge, attitudes and behaviours (KAB) related to dietary salt intake among adults in high-income countries.

Overall (n = 24 studies across 12 countries), KAB related to dietary salt intake are low. While consumers are aware of the health implications of a high salt intake, fundamental knowledge regarding recommended dietary intake, primary food sources, and the relationship between salt and sodium is lacking. Salt added during cooking was more common than adding salt to food at the table. Many participants were confused by nutrition information panels, but food purchasing behaviours were positively influenced by front of package labelling. Greater emphasis of individual KAB is required from future sodium reduction programmes with specific initiatives focusing on consumer education and awareness raising. By doing so, consumers will be adequately informed and empowered to make healthier food choices and reduce individual sodium intake.