The effect of energy drink consumption on academic performance amongst medical students

Abstract

Energy drinks are widely consumed among university students, particularly those enrolled in academically demanding programmes such as medicine. Existing literature indicates that students often consume energy drinks to combat fatigue, enhance alertness, and improve concentration, especially during examination periods. The primary active ingredient, caffeine, has been shown to provide short-term improvements in attention, reaction time, and perceived cognitive performance. Despite these potential short-term benefits, numerous studies have raised concerns about the adverse effects of frequent or excessive energy drink consumption. High caffeine intake has been associated with sleep disturbances, including reduced sleep duration, poorer sleep quality, and delayed sleep onset. Poor sleep quality has consistently been linked to impaired academic performance, diminished cognitive functioning, and reduced memory consolidation. Additionally, research suggests that energy drink consumption may be associated with increased stress, anxiety symptoms, and other negative health outcomes among university students. Background Objective The objective of the existing literature is to examine the relationship between energy drink consumption and academic performance among university students, and to explore the potential mediating roles of sleep quality and stress in this association. Several studies also aim to identify demographic differences, including sex-based variations in consumption patterns, as well as lifestyle factors that may influence both caffeine intake and academic outcomes. Method Previous research has primarily employed cross-sectional survey designs within university populations, including medical students. Data are commonly collected using structured self-administered questionnaires assessing frequency and quantity of energy drink consumption, total caffeine intake, sleep quality (often measured using validated scales), perceived stress levels, and other lifestyle factors. Academic performance is typically measured through self-reported grade point averages or official examination results where accessible. Many studies use multivariate statistical analyses to assess associations between energy drink consumption and academic performance while adjusting for potential confounders such as sleep quality, stress, demographic variables, and other sources of caffeine intake. Some longitudinal studies have also explored temporal relationships between caffeine use, sleep patterns, and academic outcomes over an academic term. Results Findings from the literature are mixed. While moderate caffeine consumption has been associated with short-term improvements in alertness and perceived study efficiency, frequent or high energy drink intake is often linked to poorer sleep quality and higher stress levels. In turn, both poor sleep and elevated stress are consistently associated with lower academic performance. Several studies suggest that the relationship between energy drink consumption and academic achievement may be indirect, with sleep disturbance and stress acting as mediating factors. Additionally, sex differences have been reported, with male students generally demonstrating higher rates of energy drink consumption compared to female students. Conclusion Overall, the literature indicates that although energy drinks may offer temporary cognitive benefits, excessive or frequent consumption may negatively impact academic performance through disrupted sleep and increased stress. These findings highlight the importance of promoting healthy coping strategies and balanced caffeine consumption among university students, particularly medical students, who face substantial academic demands and serve as future healthcare professionals.