Research suggests that Tongkat Ali may support mood and stress-related outcomes across multiple study types, including randomized controlled trials, preclinical animal studies, and narrative reviews, with findings generally pointing in a consistent supportive direction. The most directly relevant human trial found that a standardized hot-water extract reduced salivary cortisol and improved self-reported measures of tension, anger, and confusion in moderately stressed adults compared to placebo, while a separate RCT in older men with low testosterone reported improvements in fatigue and aging-related symptom scores alongside hormonal changes. Studies indicate that these mood-adjacent effects may be linked in part to cortisol modulation and testosterone support, though animal studies also point to possible direct anxiolytic mechanisms independent of hormonal pathways. Limitations worth noting include the relatively small sample sizes in the human trials, the short duration of most studies, a reliance on self-reported mood measures, and the fact that several supporting sources are preclinical or review-level rather than independent clinical replications, meaning the overall evidence base, while promising, remains preliminary.
Citations from PubMed and preprint sources. Match score (0-100) reflects automated search ranking, not clinical appraisal.
| Title | Type | Year | Direction | Match |
|---|---|---|---|---|
| Effect of Tongkat Ali on stress hormones and psychological mood state in mode... | Other | 2013 | Supports | 97 |
| Studies on the anxiolytic activity of Eurycoma longifolia Jack roots in mice. | Other | 1999 | Supports | 85 |
| Review Ergogenic Effect of Long Jack, Eurycoma Longifolia. | Other | 2016 | Supports | 72 |
| Eurycoma longifolia (Tongkat Ali) supplementation enhances sleep and wake con... | Other | 2024 | Supports | 65 |
| Plant-based medicines for anxiety disorders, Part 1: a review of preclinical ... | Review | 2013 | Supports | 65 |
| Review on a Traditional Herbal Medicine, Eurycoma longifolia Jack (Tongkat Al... | Review | 2016 | Supports | 62 |
| Effect of Eurycoma longifolia standardised aqueous root extract-Physta(®) on ... | Other | 2021 | Supports | 60 |
| Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as te... | Other | 2012 | Supports | 58 |