Acute Dose-ranging Effects of Mango Leaf Extract (Zynamite® 15%) on Cognitive Function and Cerebral Blood Flow

Cognitive Change Clinical Trial

Official title: Acute Dose-ranging Effects of Mango Leaf Extract (Zynamite® 15%) on Cognitive Function and Cerebral Blood Flow in Healthy Young Adults

Status Completed

Clinical Trial Summary

Zynamite® is a novel mango (Mangifera indica) leaf extract standardized to contain polyphenol mangiferin.It has previously been shown to enhance brain oxygenation, physical performance and ergogenic parameters following ischemia-reperfusion in healthy humans when consumed alongside other polyphenols. Preliminary data has also indicated that a single 300mg dose of Zynamite® (60%) can improve performance across a range of cognitive tasks.This study aims to evaluate the effects, in healthy adults, of 3 doses of Zynamite® 15% on performance across a number of cognitive domains, as well as during a period of cognitively demanding task performance. A second sub-study will assess cerebral blood flow during cognitively demanding task performance.

Clinical Trial Description

Extracts made from the leaves of the mango food plant (Mangifera indica L., Anacardiaceae) have a long history of medicinal usage, most likely due to particularly high levels of the polyphenol mangiferin. Zynamite®, is a novel mango (Mangifera indica) leaf extract standardized to contain polyphenol mangiferin which has previously been shown to enhance brain oxygenation and physical performance and ergogenic parameters following ischemia-reperfusion in healthy humans when consumed alongside other polyphenols.A recent study in rats demonstrated a similar effect of Zynamite® on electrophysiological (EEG) spectral power as that seen following caffeine, with a synergistic effect of co-consumption of Zynamite® and caffeine. A concomitant ex vivo study demonstrated increased long-term potentiation (LTP) in rat hippocampal slices, suggesting the potential for Zynamite® to enhance memory. Previous research has also demonstrated that both single doses and chronic administration of polyphenols can beneficially modulate cognitive function, including during cognitively demanding task performance. Previous research has also shown that polyphenols and polyphenol rich treatments can modulate cerebral blood-flow. These findings raise the possibility that Zynamite® may have beneficial effects on psychological and hemodynamic parameters, potentially with some similarities to the effects exerted by caffeine.

A recent study expanded on the above assessing the effects of a single dose of Zynamite® (60% of polyphenol mangiferin) on performance across a number of cognitive domains (attention, working memory, episodic memory, executive function), as well as during a period of cognitively demanding task performance, and during laboratory-induced stress. The results showed that a single dose of 300 mg Zynamite® significantly improved performance accuracy across the tasks in the battery, with domain-specific effects seen in terms of enhanced performance on an 'Accuracy of Attention' factor and an 'Episodic Memory' factor as well as improved performance across all three tasks (Rapid Visual Information Processing, Serial 3s and Serial 7s subtraction tasks) of the Cognitive Demand Battery sub-section of the assessment, which assesses cognitive function and subjective mental fatigue during sustained performance of mentally demanding tasks. All of these cognitive benefits were seen across the post-dose assessments (30 min, 3 h, 5 h). These results provide the first demonstration of cognition enhancement following consumption of mango leaf extract adding to previous research showing that polyphenols and polyphenol rich extracts can improve brain function.

The proposed studies will expand on the existing body of research by assessing the effects of three doses of Zynamite® (this time a lower concentration version containing 15% polyphenol mangiferin) on cognitive performance and cerebral blood flow. ;

Related Conditions & MeSH terms

• Cognitive Change

• NCT number: NCT05580146
• Study type: Interventional
• Source: Northumbria University
• Status: Completed
• Phase: N/A
• Start date: May 17, 2021
• Completion date: April 14, 2022