New research finds no link between diet and a reduced risk of dementia

New research finds no link between diet and a reduced risk of dementia

Wide range and long term study He did not find any correlation between Mediterranean diet adherence and reduce dementia risk.

The study, published in the journal Neurology, followed nearly 30,000 people for about 20 years. The researchers’ goal initially was to determine whether the diet could reduce the risk of developing a range of cognitive disorders.

One challenge with this long study period is that food habits cannot be followed longitudinally over the period to assess potential changes in dietary habits. Thus, the results are challenged by potential confounders.– Nils Peters, Neurologist, Hirslanden Clinic

The study found that following the traditional dietary recommendations or the Mediterranean diet was not significantly associated with a lower risk of all-cause dementia, Alzheimer’s disease or vascular dementia.

The researchers added that the results were similar when excluding participants who had developed dementia within five years and who had diabetes.

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cases of dementia It is expected to triple over the next 30 years, highlighting the importance of finding modifiable risk factors for dementia,” the researchers wrote.

The scientists based their findings on the dietary habits of more than 28,000 residents of the Swedish city of Malmö who were born between 1923 and 1950 and took part in the prospective study. The Swedish population-based Malmö Diet and Cancer Study between 1991 and 1996, with follow-up of dementia incidences until 2014.

During that period, nearly 7 percent of the participants developed various types of dementia. No specific diet was associated with signs of Alzheimer’s disease in affected patients.

Food habits were assessed through a seven-day food diary, a detailed food frequency questionnaire and a one-hour interview,” the researchers wrote.

Previous studies have shown the benefit of a Mediterranean diet on cognition and brain function, especially in older adults.

A study published in 2021 in the Journal of Clinical Nutrition found that participants experienced Small to moderate improvements” in many cognitive areas After following the Mediterranean diet for three years compared to a control group. The improvements included improvements in spatial, visual, and verbal memory and attention span.

In another 2022 study from Harvard University, researchers found that a green Mediterranean diet is low in red meat Protecting the brain from age-related debilitating cerebral atrophy.

However, the new Swedish research confirmed the findings of two studies conducted by the American Medical Association in 2019, which included thousands of individuals, but found no evidence that diet, including the Mediterranean diet, affects the risk of dementia. .

Commenting on the Swedish study, Nils Peters, a neurologist at Klinik Hirslanden in Switzerland, and Benedita Nachmias, assistant professor of neuroscience at the University of Florence in Italy, note that Diet as a single factor may not have a strong enough effect on cognition, but it is more likely to be considered as a factor in combination with various other factors, and their combination may influence the course of cognitive function.”

Other factors include regular exercise, smoking, alcohol consumption, and stress.

One of the challenges for this long study period is that dietary habits cannot be followed longitudinally over the period to assess potential changes in dietary habits,” Peters told Live Science.

Thus, results are challenged by potential confounding factors, such as changes in dietary habits, lifestyle changes or newly occurring medical conditions over time.



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