The Claim
Tongkat Ali supplementation reduces sex hormone-binding globulin (SHBG) concentration, which increases the proportion of free, biologically active testosterone in systemic circulation.
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 Tongkat Ali supplements lowers the level of sex hormone-binding globulin in the blood, resulting in a higher percentage of testosterone that is not bound and available for biological activity.
See the scientific wording
Tongkat Ali supplementation reduces sex hormone-binding globulin (SHBG), increasing the proportion of free, biologically active testosterone in circulation.
Tongkat Ali causes the liver to make less of a protein that binds testosterone, so more testosterone stays unbound in the blood and can enter muscle cells to activate growth signals.
What the research says
1 studyTaking Tongkat Ali supplements lowered a protein in the blood that traps testosterone, so more testosterone was free to work in the body — which is exactly what the claim says.
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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.