A recent study published in the journal ‘Nutrients’ has shown that the consumption of raisins may lead to improved cognitive scores in elderly individuals. Specifically, the study found that tests assessing orientation, visuospatial/executive and language, and recall all showed improvement compared to a placebo. Furthermore, supplementation with raisins also resulted in increased scores for quality of life and functional capacity.
The study involved 80 participants aged over 70 years old who were randomly assigned to either an intervention or a control group. The intervention group received 50g of Málaga muscatel raisins per day in addition to their regular diet for a six-month period. Cognitive performance was measured using the Montreal Cognitive Assessment (MOCA) and Mini Mental State Examination (MMSE) test at the beginning and end of the study.
The results showed a significant improvement in cognitive performance for the supplemented group. The MOCA test scores were 3.27 points higher compared to the control group, and the MMSE test scores improved by 0.36 points after six months. Immediate and delayed recall responses also showed improvement, and there was an increase in scores for quality of life and autonomy in instrumental activities of daily living.
It is worth noting that grapes, particularly raisins, are rich in polyphenols, which are known for their potent anti-inflammatory and antioxidant activities. Previous studies have suggested that dietary interventions with polyphenolic compounds may prevent cognitive decline associated with aging.
Despite the positive findings, the researchers acknowledge certain limitations of the study, such as the lack of participant blinding and potential bias due to a learning effect. They recommend future studies to consider these factors and further explore the mechanism of action behind the cognitive effects of polyphenols.
In conclusion, this study suggests that the consumption of raisins can slightly improve cognitive performance, including orientation, visuospatial/executive capacity, language, and recall. The researchers believe that flavonoids, present in raisins, may be responsible for these positive effects. Further research is needed to understand the exact mechanisms involved.
Source: Nutrients, “Effects of a Raisin Supplement on Cognitive Performance, Quality of Life, and Functional Activities in Healthy Older Adults—Randomized Clinical Trial” by María José Rodrigo-Gonzalo, Susana González-Manzano, María Carmen Pablos-Hernández, Roberto Méndez-Sánchez, Begoña Ayuda Duran, Jesús González-Sánchez, Fausto Barbero-Iglesias, Ana María González-Paramás, and José Ignacio Recio-Rodríguez.
