Consumption of 50g of raisins produces a slight improvement in cognitive performance, quality of life, and functional activities in the elderly.

Effects of a Raisin Supplement on Cognitive Performance, Quality of Life, and Functional Activities in Healthy Older Adults-Randomized Clinical Trial.

María José Rodrigo-Gonzalo, Susana González-Manzano, María Carmen Pablos-Hernández, Roberto Méndez-Sánchez, Begoña Ayuda Duran, Jesús González-Sánchez, Fausto Barbero-Iglesias, Ana M González-Paramás, JoséIgnacio Recio-Rodríguez

Nutrients

Jun 19, 2023

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Abstract

The objective of this study was to evaluate the effects of consuming 50 g of raisins on cognitive performance, quality of life, and functional activities in healthy older adults. This is a parallel randomized controlled clinical trial, in which 80 subjects over 70 years of age participated. For 6 months, the intervention group (IG;= 40) consumed 50 g of raisins per day added to their usual diet, whereas the control group (CG;= 40) received no supplement. All variables were measured at baseline and at 6 months. Cognitive performance assessed with the Montreal Cognitive Assessment (MOCA) test shows a difference of 3.27 points (95% CI 1.59 to 4.96),≤0.001, favorable to the IG, after the intervention. Among the cognitive performances, an improvement is observed in the IG in orientation, assessed both with the MOCA test 0.49 (95% CI 0.10 to 0.87),= 0.014, and with the Mini-Mental State Examination (MMSE) test, 0.36 (95% CI 0.02 to 0.70),= 0.038. In visuospatial/executive capacity and in language, improvements were also observed in the IG, 1.36 (95% CI 0.77 to 1.95),= 0.001, and 0.54 points (95% CI 0.12 to 0.96),= 0.014, respectively. Immediate and delayed recall, assessed with the Rey Auditory Verbal Learning Test, improved in the IG. In addition, the IG showed a better quality of life and greater autonomy in instrumental activities of daily living after 6 months. No significant changes were observed in the rest of the variables analyzed. Therefore, the consumption of 50 g of raisins produces a slight improvement in cognitive performance, quality of life, and functional activities in the elderly.