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Study shows diets are not linked to lower risk of dementia
A number of studies suggest that a healthy diet can reduce a person's risk of dementia. However, a new study has found that two diets, including the Mediterranean diet, are not associated with a reduced risk of dementia. The study is published in the October 12, 2022 online edition of Neurology®, the medical journal of the American Academy of Neurology. The Mediterranean diet includes high consumption of vegetables, legumes, fruits, fish and healthy fats such as olive oil, and low consumption of dairy products, meat and saturated fat. Previous studies on the effects of diet on dementia risk have had mixed results. Although our study...
Study shows diets are not linked to lower risk of dementia
A number of studies suggest that a healthy diet can reduce a person's risk of dementia. However, a new study has found that two diets, including the Mediterranean diet, are not associated with a reduced risk of dementia. The study is published in the October 12, 2022 online edition of Neurology®, the medical journal of the American Academy of Neurology.
The Mediterranean diet includes high consumption of vegetables, legumes, fruits, fish and healthy fats such as olive oil, and low consumption of dairy products, meat and saturated fat.
Previous studies on the effects of diet on dementia risk have had mixed results. Although our study does not rule out a possible link between diet and dementia, we did not find a link in our study. It had a long follow-up period, included younger participants than some other studies, and did not require participants to remember what foods they had eaten regularly years ago.
Isabelle Glans, MD, study author, Lund University in Sweden
For the study, the researchers identified 28,000 people from Sweden. At the start of the study, the participants were on average 58 years old and did not suffer from dementia. They were observed over a period of 20 years. During the study, participants completed a seven-day food diary, a detailed food frequency questionnaire, and completed an interview. At the end of the study, 1,943 people, or 6.9%, were diagnosed with dementia, including Alzheimer's disease and vascular dementia.
The researchers examined how closely the participants' diets conformed to conventional dietary recommendations and the Mediterranean diet.
After accounting for age, gender and education, researchers found no association between adherence to a conventional or Mediterranean diet and a reduced risk of dementia.
Glans noted that further research is needed to confirm the results.
Nils Peters, MD, of the University of Basel in Switzerland, who wrote an editorial on the study, said: "Diet alone may not have a sufficiently strong influence on memory and thinking, but is likely one of many other factors that influence it." Course of cognitive function. Nutritional strategies may continue to be necessary along with other measures to control risk factors.
One limitation of the study was that participants misreported their own diet and lifestyle habits.
The study was funded by the Swedish Research Council, the Knut and Alice Wallenberg Foundation, the Marianne and Marcus Wallenberg Foundation, Lund University, the Swedish Alzheimer's Foundation, the Swedish Brain Foundation and other organizations.
Source:
Reference:
Glans, I., et al. (2022) Association between dietary habits in middle age and dementia incidence over a 20-year period. Neurology. doi.org/10.1212/WNL.0000000000201336.
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