A Slimming World nutritionist has addressed certainly one of its most controversial guidelines, explaining the science behind it so folks can perceive why it is a factor.

The rule confuses lots of people (Inventory Picture) (Picture: DGLimages by way of Getty Photos)
The brand new yr has arrived, prompting numerous people to deal with any further kilos gained through the festive interval. While you are completely high quality as you’re, in the event you’re contemplating a extra aware strategy to consuming, organisations like Slimming World have constructed a repute for serving to folks obtain their targets.
But dieters have beforehand been puzzled by one specific Slimming World guideline, which many have branded as ‘odd’, with some insisting it is utterly illogical. A medical skilled has now make clear the scientific reasoning behind this controversial rule.
However which guideline has sparked such debate?
It issues bananas. For these unfamiliar with Slimming World’s system, sure meals could be consumed freely with out restriction – and bananas fall into this class.
Nonetheless, must you mash that banana, it’s going to require you to make use of a few of your ‘syns’, regardless of containing similar energy.
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Slimming World captioned their explanatory video: “What is the cope with mashed bananas? Dr Sarah Bennett, certainly one of our knowledgeable nutritionists, is right here to set the report straight”.
The video opened with quite a few bewildered feedback in regards to the banana coverage, together with: “I can eat 20 bananas and never should syn. However mash one and it is 5 syns. Make it make sense” and “You do not swallow a banana complete, you mash it together with your mouth to swallow, so how does that work?”
Dr Sarah Bennett confirmed that each mashed and complete bananas include similar calorie counts; nonetheless, there’s strong scientific proof supporting the load administration programme’s strategy.
She defined: “Mashed, blended, and juiced fruit goes down simpler, and it has much less quantity, so it is much less filling. Additionally, the method of feeling full begins lengthy earlier than the meals reaches our abdomen.
“Chewing releases satiety hormones, as do the later levels of digestion. By mashing the banana, you cut back the impression of each of those steps, so you do not really feel as full. That is while you would possibly end up reaching for different snacks later”.
Dr Sarah Bennett clarified that as a Slimming World member, “you possibly can nonetheless eat mashed banana,” including that “nothing is banned”. Nonetheless, she famous that “with regards to weight reduction, consuming complete fruit has a bunch of advantages”.
A 2025 research evaluating complete fruit and fruit juices discovered that “fruit consumed in strong kind supplies larger satiety because of delayed gastric emptying and associated physiological reactions”.
The analysis additionally highlighted that the “synergistic results of polyphenols and fibre in complete fruit profit the intestine microbiome by appearing as prebiotics and producing quick‐chain fatty acids that cut back irritation”.
In abstract, complete fruit gives extra “well being advantages than fruit juice”.
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A senior dietician at The British Coronary heart Basis acknowledged: “Entire fruits typically include much less sugar than meals like cake, biscuits and chocolate, and are available with out the added fats. Due to their water and fibre content material, they’ll fill you up for comparatively few energy.
“A medium banana, for instance, incorporates much less sugar than a normal 50g bar of milk chocolate and half the energy, making fruit a great swap for candy treats.”
















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