Research shows the average Australian adult consumes more than twice the 2.5 daily recommended serves of discretionary foods per day. Discretionary foods, while high in energy, often lack a variety of nutrients. When your diet contains too many discretionary treats, it’s often at the cost of foods that meet your nutritional needs.
The problem is we don’t always make our food choices based on our nutritional needs. What we choose to eat is often driven by our likes and wants. Discretionary foods have those all-important sensory properties that we love. Like those sweet and salty flavours and satisfying fatty mouthfeel, that readily come to mind when we ponder what to have as an afternoon or even at mealtimes. And there’s a reason for that.
Wired for satisfying desire
There’s evidence we’re physiologically hardwired to seek out, and satiate hunger, with energy-dense foods. Reward pathways in the brain are geared towards gratification for consuming energy-rich foods. And we instinctively know which foods are high in energy because of their taste and mouthfeel. It feels good to consume those sweet, salty, and fatty foods because the brain rewards us through the release of feel-good chemicals such as dopamine.
It’s an ancestral hangover from our food scarce roots. Our distant ancestors may have survived food scarcity because of their preference for high energy foods, when available. But today we live in a world where energy-dense food is convenient and abundant. The mismatch has implications for our diet-related health. Rather than rewire the human brain, our researchers have come up with an innovative approach to trick your brain into eating healthy.
Trick your senses for a win/win
In a bid to satisfy our desire-driven choices and meet our nutritional needs we have identified and designed a way to use nutrient-rich, sensory matched, food swaps. The team have identified core foods that are matched to similar sensory profiles of the discretionary foods we love. Using the swaps, you can trick your mouth and your mind with the same taste and feel. Satisfying your sensory hankerings while improving the quality of your diet.
The team used data from a panel of trained sensory experts, who assessed and rated the sensory characteristics of hundreds of discretionary foods and healthier core foods. They then matched that data to information in the latest national nutrition survey, which reports the discretionary foods Australians eat. The team then found healthier swaps, based upon similar salty, sweet, or fatty mouthfeel, for the discretionary foods we often eat.
Take a look at some swaps:
|Discretionary option||Core match|
|Apple muffin (no icing)||Mandarin|
|Soft drink||Flavoured milk|
|Processed deli meat (like turkey slices)||Canned tuna in oil, drained|
|Milk chocolate, with dried fruits and nuts||Muesli with dry fruit, toasted or natural|
|Potato crisps or chips||Rice cracker plain/biscuit savoury|
|Lamington filled with jam and cream||Date dried|
|Muesli bar with fruit and nuts||Apple dried|
|Deep-fried potato chips||Edam cheese|
A research-driven approach to healthy eating
In a world first, we have modelled the nutritional gains that come from implementing the scientifically devised swaps. Our research shows when you switch out discretionary foods for the sensory matched, core foods the macronutrients and micronutrients in your diet improve.
For the average Aussie, this was what resulted from using the swaps:
- Total energy coming from protein increases by 8.7 per cent
- Dietary fibre increases by 7.3 per cent
- Calcium intake increases by 50.2 per cent
- Potassium intake increases by 9.9 per cent
- Zinc consumption increases by 17.4 per cent
- Vitamin C also increases, by 23.2 per cent
Whereas decreases were seen in ‘bad’ fats and sugars :
- A 46 per cent reduction in energy coming from added sugars
- Total energy from carbohydrates decreases by 2.3 per cent
- Total energy from fat decreases by 2.4 per cent
The aim of the research was to improve, and quantify the improvements, in diet quality through the swaps, rather than reduce average energy intake. And the modelling revealed a small, 3.6 per cent, increase in energy intake.
The improvements in nutrient profile came from a big increase in fruit consumption, grains, and proteins (such as dairy) but not from vegetables. What’s interesting is that vegetables appear to have their own specific sensory properties that aren’t often similarly matched to many of your discretionary favourites.
If you’ve missed the boat on loving the taste and feel of veg, it’s not too late for your children! Our research discovered if you introduce a variety of veg to children at a young age, they’re more likely to become accustomed to them and learn to love them. In fact, preferences for discretionary foods and eating patterns are set at a young age, so why not also try some swaps out with your children today.
Our researchers are hoping to extend their food swap modelling and undertake a new study inviting people to record data while following the swaps. Continued work on sensory swaps could contribute to new healthy eating programs and further investigation of improving dietary recommendations through the application of sensory science.
25th May 2022 at 11:38 am
Interesting Roger, I was also reading this with a (very) low-carb lens. As a type 1 diabetic, following a very low carb diet is what helps me maintain a stable and healthy blood glucose level, essential for preventing further diabetic complications. I would need to adjust some of the swaps here to fit my criteria (dried fruit is very concentrated with sugars and I’d make flavoured milk with unsweetened nut milk and other low carb flavours). I agree that tuna in olive oil and cheese are satiating alternatives.
18th May 2022 at 6:29 pm
Very interesting article. The suggested ‘swaps’ pretty much bear out the idea (still slowly emerging even though it has been around for decades!) that we should aim for low carbohydrate diets (which implies low wheat, for example), and that fat, saturated or not, is not the ogre we have all been told. Papers such as “Saturated Fats and Health: A Reassessment and Proposal for Food-Based Recommendations – j.jacc.2020.05.077” bear this out, with some understandable caution. But the medical profession, including dieticians, still seem to be locked into the old way of thinking. So, what is right? If the ‘new think’ is right, what will it take for the medical profession as a whole to adopt it?
3rd June 2022 at 9:03 pm
Hi Roger, that article you linked is a little misleading. The evidence shows that its the ratio of unsaturated to saturated fats in your diet that make the biggedt difference to overall health. Of course the more saturated fats you consume, the more unsaturated fats you would need to consume to offset this. If you are eating low carb, you are more likely to achieve this given you nearly eliminate a macronutrient from your choices (carbs). Also inevitably, if you consume large amounts of either or both types of fats, you will likely gain weight which there is plenty of evidence to show carries negative health implications. So while saturated fats can definitely have a place within our diets, like anything, moderation and understanding is key.