Dietary patterns linked to accelerated cognitive decline

Research indicates that unhealthy dietary patterns, specifically a Western-style diet, are associated with faster cognitive decline in individuals with a genetic predisposition to Alzheimer’s disease. A study led by Murdoch University and Alzheimer’s Research Australia, utilizing data from the Western Australia Memory Study, tracked older adults over seven years. The findings revealed that among participants carrying the APOE ε4 allele, higher adherence to a diet rich in red and processed meats, sweets, and refined grains was linked to a faster decline in attention.

Complementary research from the Institute of Science Tokyo has identified a potential molecular mechanism for such decline. Studies involving mice showed that high-calorie diets lead to a reduction in the protein PQBP1, which is essential for proper nerve cell transmission. This reduction, influenced by insulin, causes abnormalities in synapses and a subsequent decline in neural circuit functions. Researchers noted that these cognitive impairments could potentially be mitigated through treatments that restore PQBP1 levels or manage diabetes.