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  • Title: Postprandial effects of breakfast glycaemic index on cognitive performance among young, healthy adults: A crossover clinical trial.
    Author: Sanchez-Aguadero N, Recio-Rodriguez JI, Patino-Alonso MC, Mora-Simon S, Alonso-Dominguez R, Sanchez-Salgado B, Gomez-Marcos MA, Garcia-Ortiz L.
    Journal: Nutr Neurosci; 2020 Jan; 23(1):1-7. PubMed ID: 29649949.
    Abstract:
    Objective: To evaluate the postprandial effects of high and low glycaemic index (GI) breakfasts on cognitive performance in young, healthy adults.Methods: A crossover clinical trial including 40 young, healthy adults (aged 20-40 years, 50% females) recruited from primary healthcare centres in Salamanca, Spain. Verbal memory, phonological fluency, attention, and executive functions were examined 0, 60, and 120 minutes after consuming a low GI (LGI), high GI (HGI), or water breakfast. Every subject tried each breakfast variant, in a randomized order, separated by a washout period of 7 days, for a total of 3 weeks.Results: A significant interaction between the type of breakfast consumed and immediate verbal memory was identified (P<.05). We observed a trend towards better performance in verbal memory (delayed and immediate), attention, and phonological fluency following an LGI breakfast.Discussion: Cognitive performance during the postprandial phase in young, healthy adults was minimally affected by the GI of breakfast. The potential for breakfast's GI modulation to improve short- and long-term cognitive functioning requires further research.
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