Guarana

Conclusion: The results, in general, suggest that sleep quality (between-individual 0.26, CI 0.21; 0.31; and within-individual 0.35, CI 0.24; 0.45), and sleep duration (between-individual 0.14, CI 0.07; 0.21; and within-individual 0.20, CI 0.09; 0.31) are all related to self-control. Given the impact of self-control on how individuals live productive lives, a future research agenda should include a deeper investigation in the causal process (potentially via prefrontal cortex activity) linking sleep and self-control, and an examination of the moderators (individual and contextual variables) that could impa

Conclusion: Although EDs and cocaine differ in legal status and potency, their overlapping cardiovascular effects warrant greater clinical awareness and public education. Excessive EDs consumption poses a real cardiotoxic risk, especially in vulnerable populations, underscoring the need for further human research and potential regulatory consideration.

Conclusion: Whether the changes were linked to the caffeine content or other bioavailable substances in guarana is unknown. Additional studies that directly compare matched doses of caffeine versus guarana are needed to understand its effects on cognitive performance.

Conclusion: Dietary supplements are used to improve cancer-related fatigue. The results of this review showed that the use of guarana was not superior to the placebo groups, pointing to the need for further studies with better methodological quality.