Increasing the cost of sugary snacks could be more effective at tackling obesity than the tax on sugary drinks, according to a new study.
The authors of the British Medical Journal (BMJ) research found the introduction of the Soft Drinks Industry Levy in April last year led to a "wave of reformulation" by the drinks industry.
But they said a voluntary sugar reduction programme in place since 2016 has seen comparably "modest impacts", with small reductions in the sugar content of confectionery.
While the sugar levy has targeted consumption of sugary drinks in the UK, high sugar snacks including biscuits, cakes, chocolates and sweets make up more free sugar and energy intake.
According to the National Diet and Nutrition Survey, on average, sugary drinks contribute 2% of energy and 11% of free sugar intake, compared with 12% of total energy and 26% of free sugar intake from biscuits, cakes and confectionery combined.
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This has led researchers from the London School of Hygiene and Tropical Medicine and the University of Cambridge to suggest reducing purchases of these snacks could have a greater impact on population health.
They modelled a scenario where the cost of sugary snacks was increased by 20%, based on food purchase data for 36,324 UK households and National Diet and Nutrition Survey data for 2,544 adults.
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They grouped the results by household income and body mass index (BMI) and predicted the 20% increase would reduce annual average energy intake by around 8,900 calories, leading to an average weight loss of 1.3kg.
This "plausible" estimate compares with an average weight loss of 203g with the tax on sugary drinks.
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