New research supports the benefit of maintaining a diet low in ultraprocessed foods to protect the aging brain.
UPFs are highly manipulated, are packed with added ingredients, including sugar, fat, and salt, and are low in protein and fiber. Examples of UPFs are soft drinks, chips, chocolate, candy, ice cream, sweetened breakfast cereals, packaged soups, chicken nuggets, hotdogs, and fries.
Participants were grouped according to UPF consumption quartiles . Cognitive performance was evaluated using a standardized battery of tests. While analyses were adjusted for several sociodemographic and clinical confounders, the researchers say they can't exclude the possibility of residual confounding.
Kevin McConway, PhD, with the Open University, Milton Keynes, United Kingdom, said it's important to note that the study suggests"an association, a correlation, and that doesn't necessarily mean that the cognitive decline was caused by eating more ultra-processed foods." "The study doesn't establish that differences in speed of cognitive decline are caused by ultra-processed food consumption anyway. That's because it's an observational study. If the consumption of ultra-processed food causes the differences in rate of cognitive decline, then eating less of it might slow cognitive decline, but if the cause is something else, then that won't happen," McConway added.
"The same applies to this study ― the method used to measure ultra-processed food intake was not designed for that task and relied on assumptions. This makes it virtually impossible to draw any conclusions," Kuhnle said.
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