Behavioural Nudges, Physico-Chemical Solutions, and Sensory Strategies to Reduce People’s Salt Consumption

This narrative historical review examines the wide range of approaches that has been trialled/suggested in order to reduce the consumption of salt. While sodium is an essential micronutrient, there is widespread evidence that high levels of consumption are leading to various negative health outcomes. This review summarises the evidence relating to the various approaches that have been put forward to date to help reduce salt consumption over the years, while also highlighting a number of important questions that remains for future research. Solutions to reducing salt consumption include everything from the gradual reduction in salt in foods through to the reduction in the number/size of holes in saltshakers (what one might consider a behavioural nudge). Physico-chemical solutions have included salt replacers, such as monosodium glutamate (MSG) through to the asymmetric distribution of salt in processed (e.g., layered) foods. A wide range of sensory approaches to modulating expected and perceived saltiness have also been suggested, including the use of salty aromas, as well as suggesting the use of colour cues, sonic seasoning, and even textural primes. It is currently unclear whether different salty aromas can be combined to increase odour-induced taste enhancement (OITE) effectiveness. In the years ahead, it will be interesting to assess how long such solutions remain effective, as well as whether different solutions can be combined to help reduce salt consumption without having to compromise on taste/flavour

Analysing stereotypical food consumption behaviours: ‘This way up?’ Is there really a ‘right’ way to eat a biscuit?

Many of the mundane foods that we eat on an everyday basis are consumed in a manner that may be considered stereotypical, conventional, habitual or, on occasion, even a playful ritual. There are a number of reasons for such behaviours, and the potential benefits for the consumer are discussed in the case of vertically asymmetrical foods where the upper and lower surfaces differ. Maximizing the eye appeal of the food product, maximizing the multisensory flavour experience and the ubiquitous benefits of ritual to the enjoyment of consumption experiences are all put forward as possible explanations for such behaviours in this opinion piece. Ultimately, however, the paucity of empirical evidence concerning the influence of the manner of eating such ubiquitous foods (right way-up or upside-down) on the multisensory tasting experience is highlighted. This is a seemingly important lacuna in the food science literature, given the multiple competing explanations concerning how such experiences might be affected, if at all, that suggest themselves. Looking to the future, it would clearly be of great interest, given the growing global obesity crisis, to understand whether it might be possible to increase sensory enjoyment and/or satiety by the better/optimized design of foods and/or food consumption behaviours.