The Claim
Daily supplementation with 200 mg of a standardized hot-water extract of Eurycoma longifolia (Tongkat Ali) for four weeks reduces psychological tension by 11%, anger by 12%, and confusion by 15% in moderately stressed adults, as measured by the Profile of Mood States.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Taking 200 mg of Tongkat Ali extract daily for four weeks reduces psychological tension by 11%, anger by 12%, and confusion by 15% in adults with moderate stress, as measured by the Profile of Mood States.
See the scientific wording
Daily supplementation with 200 mg of a standardized hot-water extract of Eurycoma longifolia (Tongkat Ali) for four weeks significantly reduces psychological tension by 11%, anger by 12%, and confusion by 15% in moderately stressed adults, as measured by the Profile of Mood States, suggesting a beneficial effect on specific negative mood states associated with chronic stress.
A compound in the supplement reduces the protein that binds testosterone, freeing up more of it in the blood. At the same time, it lowers the production of the stress hormone cortisol. The higher testosterone and lower cortisol together calm overactive stress circuits in the brain, reducing feelings of tension, anger, and confusion.
What the research says
1 studyThis study found that people who took a specific Tongkat Ali supplement every day for four weeks felt less tense, less angry, and less mentally confused — just like the claim says. It didn’t change how sad or tired they felt, which also matches.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.