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Effects of Guarana and Green Tea Consumption on Students' Intellectual Performances.

  • 2025-03-12
  • Nutrients 17(6)
    • Valentina Amaritei
    • Petronela-Elena Buruiana
    • Roxana Filip
    • Florin Filip
    • Ancuta Veronica Lupaescu
    • Monica Iavorschi
    • Roxana-Elena Gheorghita

Study Design

Type
Clinical Trial
Population
33 students, mostly women, from various faculties
Methods
consumed 2 g guarana per day for ten days and 1.5 g green tea per day for ten days; completed cognitive tests before and after
Duration
ten days
Funding
Unclear
  • Rigorous Journal

Background

guarana and green tea are known as compounds that may improve cognitive performance due to their high content of caffeine and other neurostimulants, such as theobromine in the case of guarana and ECGC (apigalocatechin-3-galate) in that of green tea.

Methods

this study investigates the effects of Paullinia cupana (guarana) and Camellia sinensis consumption on students' intellectual performance. The study group consisted of 33 students, mostly women, from various faculties. During the studied period, they consumed 2 g guarana per day for ten days and 1.5 g green tea per day for ten days. The students completed three cognitive tests before and after administration of the products, measuring reaction speed, memory, and attention. They also completed questionnaires regarding health status, product information, product quality, purchase intention, consumer confidence in the product, and perception of effects and preferences.

Results and discussion

the results showed that both guarana and green tea fostered significant improvements in cognitive performance. However, more people felt the effect of guarana than the effect of green tea. The study found a strong correlation between cognitive effects and guarana administration, including improvements in energy and retention of information. For green tea, a calming effect and state of well-being were the most relevant responses.

Conclusions

the findings suggest that guarana and green tea may constitute a useful strategy for improving academic performance. However, further research is needed to determine optimal doses, frequency of consumption, and potential long-term effects on cognitive function.

Research Insights

  • Guarana→Improved Memory Function

    The results showed that both guarana and green tea fostered significant improvements in cognitive performance.

    Effect
    Beneficial
    Effect size
    Moderate
    Dose
    2 g guarana per day
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