For hormonal support and healthy testosterone levels, **Tongkat Ali** (Eurycoma longifolia) has moderate clinical backing from several RCTs, mostly in men with low or borderline testosterone. At 400mg per capsule taken twice daily (800mg total), your daily intake exceeds the 200-400mg range used in most clinical studies — though higher doses have been used safely in research.
The clinical evidence is strongest for stress-related hormonal effects. What this means for you: multiple trials show improvements in cortisol-to-testosterone ratios, perceived stress, and subjective well-being in stressed adults. Effects on actual testosterone levels are more modest and appear most meaningful in men starting with lower baseline levels.
One thing to know: the label doesn't specify standardization to eurycomanone or other marker compounds. Standardized extracts (like LJ100) were used in most positive trials, so without that detail, it's harder to confirm you're getting the same potency used in research.
BioStacks
Other Ingredients (3)
Rice ExtractFiller
Rice-based ingredients carry risk of inorganic arsenic contamination. Vague labeling — 'rice extract' does not specify what is extracted or standardized. Used as a cheap filler with no supplemental benefit.
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.