Shilajit vs Tongkat Ali: Testosterone, Evidence & Stacking (2026)

Shilajit vs tongkat ali: head-to-head comparison

What is tongkat ali?

Tongkat ali (Eurycoma longifolia) is a flowering plant native to Southeast Asia whose root extract has been used in traditional medicine for centuries as a tonic for vitality and male sexual health. The primary bioactive compound is eurycomanone, a quassinoid.

Unlike shilajit, which works broadly through mineral transport and antioxidant mechanisms, tongkat ali's proposed action is more specific to the hormonal axis. It appears to stimulate luteinizing hormone (LH) production, which in turn signals Leydig cells in the testes to produce more testosterone. It may also modulate the hypothalamic-pituitary-adrenal (HPA) axis, reducing cortisol levels in stressed individuals. Cortisol and testosterone have an inverse relationship: chronically high cortisol suppresses testosterone production, so lowering cortisol can indirectly support testosterone levels.

The standardized extract most studied in clinical trials is Physta, a water-soluble root extract standardized to eurycomanone content. When evaluating tongkat ali products, look for this standardization, since generic "tongkat ali root powder" may contain very different (and much lower) levels of the active compound.

Testosterone evidence: shilajit vs tongkat ali

Tongkat ali has a numerically stronger evidence base for testosterone, with five RCTs pooled in a 2022 systematic review and meta-analysis. Shilajit has one well-designed RCT from one research group.

Tongkat ali: Leisegang et al. (2022) conducted a systematic review and meta-analysis of nine studies (five RCTs eligible for pooling) examining Eurycoma longifolia as a sole intervention for testosterone levels. The meta-analysis found a statistically significant increase in total testosterone (SMD = 1.352, p = 0.001), confirmed in the hypogonadism subgroup (Medicina, PubMed). The evidence is stronger than any single study because it pools data across multiple groups and settings.

Shilajit: Pandit et al. (2016) gave 500 mg/day to 96 healthy men aged 45 to 55 for 90 days. Total testosterone rose ~20%, free testosterone ~19% versus placebo (PubMed). This is a well-designed single RCT, but it has not been independently replicated by a separate research group.

On testosterone evidence alone, tongkat ali is ahead. However, "ahead" means "further along a still-early evidence path." Neither compound has the large-scale, multi-center confirmatory trials that would be needed to call either a proven testosterone intervention. Both are promising but preliminary. A 2024 systematic review of testosterone-booster supplements by a team of urologists concluded that most marketed products lack rigorous verification of their claimed testosterone benefits, which applies to herbal options on both sides of this comparison (Morgado et al., 2024, International Journal of Impotence Research, PubMed). For the full shilajit evidence audit, see does shilajit actually work.

Beyond testosterone: where shilajit has more data

Shilajit's advantage is breadth. While tongkat ali's trial data clusters around testosterone and cortisol, shilajit has published RCTs across a wider range of outcomes.

Exercise and muscular strength: Keller et al. (2019) showed that shilajit preserved muscular strength under fatigue in 63 men over 8 weeks (PubMed). Tongkat ali does not have a comparable exercise-performance trial, though some cortisol-reduction data could be tangentially relevant to recovery.

Bone density in women: Pingali et al. (2022) ran a 48-week trial in 60 postmenopausal women showing dose-dependent bone mineral density preservation (PubMed). Tongkat ali has one RCT on menopausal quality of life but no bone data.

Female sexual function: Mosavi et al. (2023) found significant FSFI improvements in women taking shilajit for 60 days (DOI). Tongkat ali's female data is limited.

Male fertility: Biswas et al. (2010) reported a 61% increase in sperm count in subfertile men (PubMed). Tongkat ali has some semen-parameter data but less directly comparable.

If your interest is narrowly testosterone, tongkat ali has more supporting data. If your interest spans testosterone, exercise, bone health, fertility, and women's health, shilajit covers more ground. See shilajit benefits for men for the male-specific picture.

Where tongkat ali has more data

Tongkat ali has published data in two areas where shilajit does not: cortisol reduction and erectile function (in combination with exercise).

Cortisol: Several tongkat ali trials have measured cortisol as an outcome and found reductions in stressed populations. Shilajit's adaptogenic properties are discussed in reviews (Stohs et al., 2014, PubMed), but no shilajit trial has measured cortisol directly.

Erectile function: One 6-month RCT tested 200 mg/day of tongkat ali combined with concurrent training in 45 men with androgen deficiency of aging males (ADAM). The group receiving both interventions showed significant improvement on the IIEF-5 (erectile function score). The limitation is that you cannot separate the tongkat ali effect from the exercise effect, since both contributed. Shilajit has no direct ED trial data at all. See shilajit and sexual health for the full picture.

Can you take shilajit and tongkat ali together?

Their mechanisms do not overlap, which makes stacking theoretically rational. Shilajit acts on mineral transport and mitochondrial energy; tongkat ali acts on the HPG axis and cortisol. In principle, they could support testosterone from two different angles simultaneously.

No clinical trial has tested this combination. The safety of the stack is unknown beyond the individual safety profiles of each compound at standard doses. If you choose to stack, use products with verified doses and third-party testing for both, and consult your doctor if you take any medication affecting hormones, blood pressure, or blood sugar.

A practical concern: adding two "testosterone support" supplements does not double your testosterone. Biological systems have feedback loops. If one supplement modestly raises testosterone, the body may partially compensate, limiting what a second supplement can add. Stacking should be approached with realistic expectations, not additive math.

Who should choose which?

The choice depends on what you are optimizing for.

Choose shilajit if you want broader health coverage (testosterone plus exercise, bone density, fertility, mineral absorption), if you are a woman seeking evidence-based supplementation, or if fulvic acid's mineral-transport mechanism aligns with your health goals. Shilajit is the better pick for general wellness beyond testosterone alone. For our tested capsule, see Shilajit Adaptogen Complex.

Choose tongkat ali if your primary goal is testosterone support and you want the compound with more pooled RCT data behind that specific claim, or if cortisol reduction is a priority (relevant for high-stress individuals whose cortisol may be suppressing testosterone).

Consider both if you have the budget, both products are third-party tested, and you understand that the combination is untested and results are not guaranteed to be additive.

Choose neither if you have clinically diagnosed hypogonadism. Both are supplements with modest effects. Low testosterone that causes symptoms needs medical evaluation and potentially testosterone replacement therapy, not herbal supplements. See your doctor first.

Why we formulated with shilajit

We chose shilajit for our Adaptogen Complex because its evidence spans more outcomes than testosterone alone, and its fulvic acid mechanism (mineral transport, mitochondrial support, antioxidant activity) aligns with our broader wellness positioning. Tongkat ali is a legitimate supplement with real data, and we may consider it in future formulations. For now, shilajit's combination of breadth, mechanism, and E-E-A-T-strength clinical citations made it the stronger foundation for an evidence-first product. For the best shilajit supplements across the market, see our full comparison. For dosing protocol, see shilajit dosage. For timing, see best time to take shilajit.

Testing & Transparency Methodology

Every YourHealthier product is manufactured in an FDA-registered, UL Solutions GMP-certified facility and undergoes independent third-party testing for heavy metals and microbial contamination using validated USP, AOAC, and ICP-MS methods. Batch-specific certificates of analysis are published at yourhealthier.com/pages/lab-results. All testing complies with 21 CFR Part 111. This article is for educational purposes and is not medical advice; it has not been evaluated by the FDA and is not intended to diagnose, treat, cure, or prevent any disease.

References

Frequently asked questions

This statement has not been evaluated by the Food and Drug Administration. This article is for informational purposes only and is not medical advice. Neither shilajit nor tongkat ali is intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement. YourHealthier manufactures and sells shilajit products discussed here.