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Nutrition to Prevent or Treat Cognitive Impairment in Older Adults: A GRADE Recommendation

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Abstract

Aging is associated with cognitive declines leading to mild cognitive impairments or Alzheimer disease. Nutrition appear to protect from aging. Some dietary factors could either increase or protect against cognitive declines. This article aimed to provide GRADE recommendations related to nutrition aspects able to prevent or to treat cognitive impairments. A comprehensive literature review was performed using Medline database. The GRADE approach was used to classify quality of the existing evidence (systematic review or meta-analysis). The GRADE process led us to formulate seven key nutritional recommendations to manage cognitive declines, but did not allow us to do it for protein, vitamin B or antioxidants. Thus, 1) adherence to a Mediterranean diet (GRADE 1B); 2) high-level of consumption of mono- or poly- unsaturated fatty acids combined to a low consumption of saturated fatty acids (GRADE 1B); 3) high consumption of fruits and vegetables (GRADE 1B); 4) higher vitamin D intake (GRADE 1C) than the recommended daily allowance. In addition, a ketogenic diet, a low consumption of whole-fat dairy products or a caloric restriction are promising nutritional habits although the evidence does not yet support widespread uptake (GRADE 2C). In conclusion, nutrition is an important modifiable factor to prevent or protect against cognitive decline. Nevertheless, more studies are required to determine specific guidelines such as duration and amounts of nutrients to help older adult to maintain a healthy cognitive life.

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Funding

M. Aubertin-Leheudre and F. Buckinx are supported by the Fonds de Recherche du Québec Santé (FRQS). F. Buckinx is also supported by the IRSC (Instituts de recherche en santé du Canada).

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Authors and Affiliations

  1. Department of Exercise Sciences, Université du Québec à Montréal (UQAM), Montréal, Qc, Canada

    F. Buckinx & Mylene Aubertin-Leheudre

  2. Centre de Recherche de l’Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, Qc, Canada

    F. Buckinx & Mylene Aubertin-Leheudre

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  1. F. Buckinx
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  2. Mylene Aubertin-Leheudre
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Correspondence to Mylene Aubertin-Leheudre.

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Buckinx, F., Aubertin-Leheudre, M. Nutrition to Prevent or Treat Cognitive Impairment in Older Adults: A GRADE Recommendation. J Prev Alzheimers Dis 8, 110–116 (2021). https://doi.org/10.14283/jpad.2020.40

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  • DOI: https://doi.org/10.14283/jpad.2020.40

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