Benefits
Faster information processing after a single dose
In a randomized, double-blind, placebo-controlled crossover study in 119 healthy university students, a single 100 mg or 150 mg dose of Zynamite S improved processing speed and cognitive flexibility compared with placebo, with testing at 30 minutes, 3 hours and 5 hours after the dose. The study was funded and designed by the ingredient manufacturer, and it tested one dose taken once, so it says nothing about what happens with regular daily use.
Short-term shifts in mood state
In the same 119-student crossover study, people reported lower tension, depression and confusion after a single dose compared with placebo, measured at 30 minutes, 3 hours and 5 hours. These are short-term changes in mood state in healthy young adults over the course of one day. They are not evidence of treatment for depression, anxiety or any other condition, and no published trial has looked at whether anything persists beyond that single day.
Caffeine-free and mixes into drinks
Zynamite S dissolves in water, which is why it shows up in drink mixes and ready to drink beverages rather than only in capsules. It contains no caffeine, so it does not carry caffeine's jitteriness or sleep concerns. No published study has compared it head to head with caffeine, or looked at tolerance or effects beyond a single dose, so 'clean energy' claims go further than the evidence.
Better on some timed tasks, no memory improvement
In the 119-student study the gains appeared on tasks measuring processing speed and cognitive flexibility, meaning task switching. Memory was the clear miss: there was no significant difference between Zynamite S and placebo on short-term or long-term verbal memory. So the honest summary is a modest, short-lived edge on a few timed tasks in healthy young students, not broad memory or brain enhancement.
Mechanism of action
How it might work: mangiferin and adenosine signaling (proposed, not demonstrated)
This is a proposed explanation, not a demonstrated one. Mangiferin, the main compound in mango leaf extract, is thought to interact with adenosine signaling, the same fatigue pathway caffeine acts on, and to influence how cells produce energy. None of the human studies cited on this page measured adenosine receptors or brain energy metabolism, so why the short term effects appear is still unknown. The one human muscle biopsy study cited here gave Zynamite together with quercetin, so its findings cannot be credited to Zynamite on its own, and it looked at muscle signalling rather than the brain.
Clinical trials
Randomized, double-blind, placebo-controlled crossover study of a single acute dose of mango leaf extract on cognitive function in healthy adults. This trial tested mango leaf extract, not the water-soluble Zynamite S form this page is about. Published in Frontiers in Nutrition, 2024 (PMID 38665302).
Healthy adults. Double-blind, randomized, placebo-controlled crossover with a single acute dose, cognitive and mood testing on the same day. The extract was supplied by the manufacturer and was not the water-soluble Zynamite S form.
Results were mixed and largely null on the behavioural cognitive measures, so this study offers weak support at best for an acute cognition benefit.
The one published trial of the water-soluble Zynamite S form. Randomized, double-blind, placebo-controlled crossover design, funded and designed by the ingredient maker Nektium. Published in Pharmaceuticals, 2025 (PMID 40284006).
119 university students (mean age 20.3 yrs). Double-blind, placebo-controlled crossover; a single 100 mg or 150 mg dose of Zynamite S versus placebo, with assessments at 30 minutes, 3 hours and 5 hours after that one dose.
A single 100 mg or 150 mg dose improved processing speed and cognitive flexibility versus placebo and lowered scores for tension, depression and confusion. There was no significant difference in short-term or long-term verbal memory, so the memory endpoint failed. Effects were modest, the trial was industry funded and industry designed, and it tested one dose on one day, so it does not show a benefit from taking the ingredient regularly. Published in Pharmaceuticals, 2025.