NutriStack
Shilajit and Tongkat Ali, a synergy.
Shilajit and Tongkat Ali are frequently stacked for testosterone, energy, and libido, and the pairing is mechanistically coherent rather than redundant: one nudges hormone production and precursors while the other increases the free, biologically active fraction. This complementary action is why the two appear together in many men's vitality formulas. The same additive androgenic effect is the reason the combination warrants a note for anyone who should not raise testosterone.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Shilajit and Tongkat Ali
- Pair type
- Synergy
- Evidence (highest tier)
- Emerging
- Source citations
- 3 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Synergy · Emerging evidence
Synergy
What is happening. Shilajit and Tongkat Ali are frequently stacked for testosterone, energy, and libido, and the pairing is mechanistically coherent rather than redundant: one nudges hormone production and precursors while the other increases the free, biologically active fraction. This complementary action is why the two appear together in many men's vitality formulas. The same additive androgenic effect is the reason the combination warrants a note for anyone who should not raise testosterone.
Mechanism. The two act on the androgen axis at complementary points. Purified Shilajit (its dibenzo-alpha-pyrones and fulvic acid fraction) raised total testosterone, free testosterone, and DHEA-S in a 90-day placebo-controlled trial, consistent with support of upstream steroidogenesis. Tongkat Ali (eurycomanone) is associated with higher free testosterone largely by lowering sex hormone binding globulin, freeing more of the existing pool. Acting upstream (production and DHEA precursor) plus downstream (reduced SHBG, higher free fraction) gives an additive, potentially synergistic effect on free androgen levels.
Recommendation. For general vitality goals, a common pairing is roughly 250 mg purified Shilajit once or twice daily with 200 to 400 mg of a standardized Tongkat Ali extract, taken in the morning. Start each one individually for one to two weeks before combining so you can judge tolerance and effect. Men with hormone-sensitive conditions (such as prostate cancer or elevated hematocrit) and anyone on testosterone therapy or fertility treatment should consult a clinician before stacking, since effects on free testosterone are additive. Not for use in pregnancy.
Minimum separation. None required; can be taken together
Sources (3)
- Pandit S. et al., Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers, Andrologia
- Controlled trials and reviews of Eurycoma longifolia (Tongkat Ali) reporting increased free testosterone and reduced sex hormone binding globulin
- Men's health formulation literature describing complementary androgen-axis mechanisms of Shilajit and Tongkat Ali
Stack Score
How this pair moves the number.
Effect on the composite score
If both Shilajit and Tongkat Ali are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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