Benefits
Peak power output improvement in single dose
A double-blind, placebo-controlled crossover trial in 40 physically active adults (20 men, 20 women) found that a single 140 mg Zynamite® plus 140 mg quercetin dose taken an hour before exercise raised peak power by 2.8% to 3.8% across the first three Wingate sprints (p=0.01). That is a small change, measured once rather than across a training program, and the study was partly financed by Nektium, the ingredient maker, which also helped design it. Whether the same edge shows up in everyday training has not been tested.
Peak oxygen uptake and muscle function in a small trial
The studies cited on this page do not include a basketball or team sport trial, so no such claim can be made here. What is cited is a small human study in which mango leaf extract combined with either luteolin or quercetin raised peak oxygen uptake and peak power and helped preserve muscle function when blood flow to the limb was briefly cut off and restored. Because part of that study used luteolin rather than quercetin, it is not a clean test of the Zynamite® PX formula, and the work was manufacturer supported.
Exercise-induced muscle damage recovery
In a randomized trial, people who ran 10 km and then did drop jumps reported less muscle pain and showed less muscle damage, and recovered faster, when taking Zynamite® plus quercetin than with placebo. The sample was modest and the study was supported by the ingredient maker, Nektium, so the result is promising rather than settled.
How it is thought to work (not a proven benefit)
The core mechanism (mangiferin's oxygen utilization enhancement) improves the efficiency of aerobic energy production — meaning athletes produce more ATP per unit oxygen consumed during exercise. This explanation comes from laboratory work and was not measured in the human studies cited here. Those studies number four, not the 10 or more often advertised, and one of them tested short term cognitive performance in healthy adults rather than exercise.
Mechanism of action
Mangiferin mitochondrial oxygen extraction and vascular NO enhancement
Laboratory work suggests mangiferin may help muscle cells take up and use oxygen more efficiently, which would mean more energy produced per unit of oxygen. Quercetin is thought to increase how much mangiferin is absorbed and to relax blood vessels so more oxygen and nutrients reach working muscle. None of these steps were measured in the human trials cited on this page, so they remain a plausible explanation rather than a demonstrated one. The performance differences that were actually measured were small, around 3%, and were seen after a single dose.
Clinical trials
Randomized, double-blind, placebo-controlled crossover study in 40 physically active adults (20 men, 20 women) testing a single dose of Zynamite® (140 mg) plus quercetin (140 mg) taken about 1 hour before repeated sprint exercise. Published in Nutrients in 2019 (PMID 31661850). Partly financed by Nektium Pharma, which supplied the compounds and took part in designing the study.
40 physically active adults (20 men, 20 women). Single dose, acute crossover design, so it shows same day effects only.
Peak power output improved by 2.8% and 3.8% across the first three Wingate sprints compared with placebo (p=0.01). The extra claims attached to this study here, better muscle oxygenation, lower perceived exertion, and an advantage for a lecithin enhanced version, are not supported by the published report. With 40 people and one dose, a roughly 3% difference should be read as preliminary.
Randomized trial of Zynamite® mango leaf extract plus quercetin taken around a 10 km race followed by drop jumps, measuring muscle damage, pain and recovery. Published in Nutrients in 2020 (PMID 32110986), with support from the ingredient maker, Nektium.
Adults completing a strenuous exercise protocol (a 10 km race plus drop jumps). Modest sample size, and the work was manufacturer supported rather than independent. The basketball trial previously described here is not among the studies cited on this page.
Zynamite® plus quercetin reduced muscle pain and signs of muscle damage and sped recovery compared with placebo. This is one manufacturer supported trial, so the result needs independent replication before it can be treated as settled.