A full-spectrum aqueous extract of black cardamom (Amomum subulatum) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants
Abstract
Background: Interest is increasing in natural, plant-based, food-grade nootropics that deliver sustained cognitive benefits without adverse effects. Caffeine remains the most widely consumed psychoactive substance, owing to its rapid, short-term enhancement of wakefulness, alertness, and overall performance. The present study investigated the nootropic effect of a full-spectrum aqueous extract of black cardamom fruits and its influence when combined with caffeine.
Methods: A randomized, double-blind, placebo- and active-controlled four-arm study assessed the acute cognitive effects of full-spectrum black cardamom extract (MA2-24) in comparison with caffeine. Ninety-six healthy adults (35-65 years) were randomized (n = 24/group) to receive placebo, MA2-24 (250 mg), caffeine (200 mg), or their combination (MA2-24 + caffeine). Cognitive performance was assessed at baseline and at 1-, 3-, 5-, and 8-h post-dose using CNS vital signs assessments.
Results: MA2-24 significantly improved reaction time, accuracy, and error rate in the Shifting Attention Test and increased correct responses while reducing errors in the Symbol Digit Coding Test. The Stroop Test also showed significant improvement in reaction time and a reduction in the number of errors. Effects were significant versus baseline and placebo, mainly through 3-h post-dose, and were comparable to caffeine. Co-supplementation of MA2-24 with caffeine produced greater and more sustained benefits, especially during the later…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence. Reported size: 24 participants or records.
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