Shilajit,
does it really help with Improvement of testosterone, sperm, and fatigue?
research showsPrimaVie® shilajit has a signal from a 90-day RCT in healthy middle-aged men in which total testosterone increased by about 20%. Sperm evidence comes from an uncontrolled 35-person study, while a 63-person fatigue-and-strength RCT was null in the full sample and found a signal only in the subgroup with higher baseline strength. Evidence is concentrated on a manufacturer ingredient and lacks clinical endpoints and independent replication, supporting C.
ads claimAdvertisements use phrases such as 'testosterone booster,' 'sperm production,' 'natural energy and chronic-fatigue recovery,' and 'muscle gain.' The actual data are hormone and semen surrogates and an exercise-laboratory subgroup result for a particular purified ingredient.
Useful facts when choosing a product
- Trial products were mainly purified, standardized shilajit such as PrimaVie at 200-500 mg/day.
- Heavy-metal, microbial, and compositional profiles can vary by source and purification process.
- Improved sperm count or motility is not the same endpoint as pregnancy or live birth.
- Short trials were generally tolerated, but long-term safety of general marketed products is not established.
What the research actually shows
Biswas 2010 gave 200 mg/day for 90 days to 35 men with oligospermia in a single-arm study and reported increased sperm count, motility, and testosterone among 28 completers. The Pandit 2016 double-blind RCT reported higher total and free testosterone and DHEAS after 250 mg twice daily for 90 days in healthy men aged 45-55. In the manufacturer-funded Keller 2019 trial of 63 men, 500 mg/day reduced post-fatigue MVIC decline in the stronger half of the sample rather than the overall sample, and subjective fatigue was not measured.
Why this is classified as C (43)
Testosterone rests on a surrogate from a small PrimaVie®-specific RCT, sperm on an uncontrolled 35-person study, and fatigue and strength on a baseline-high subgroup after a null full-sample result in a 63-person RCT. Manufacturer-ingredient concentration and no independent replication result in C with 43 points.
Counterpoint. A possibility that a standardized ingredient affects selected hormonal and exercise measures remains. Product equivalence and long-term clinical meaning require separate verification.
Rejudgment record. Reassessment (cross-check reflected) — A PrimaVie-specific 90-day testosterone surrogate, an uncontrolled 35-person sperm study, a null full-sample 63-person fatigue-and-strength RCT with a baseline-high subgroup signal, and manufacturer-ingredient concentration support C
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Testosterone | C | An approximately 20% increase in total testosterone over 90 days in a PrimaVie-specific RCT is a surrogate endpoint. |
| Sperm | C | The evidence is an uncontrolled study of 35 men. |
| Fatigue and strength | D | The 63-person RCT was null in the full sample, with a signal only in the subgroup with higher baseline strength. |
Cross-check — Codex and Claude
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Biswas TK et al. 2010 | Single-arm pre-post clinical study | 28 | Natreon-linked authors and processed ingredient; details unclear | Sperm count, motility, and hormones | Sperm count, motility, and testosterone increased among completers, but there was no control group. | Supportive |
| Pandit S et al. 2016 | Randomized double-blind placebo-controlled trial | 75 | Used Natreon PrimaVie; funding details unclear | Total and free testosterone and DHEAS | Total and free testosterone and DHEAS increased versus placebo after 250 mg twice daily for 90 days. | Key |
| Keller JL et al. 2019 | Randomized double-blind placebo-controlled trial | 63 | Funded by Natreon Inc. | Pre/post-fatigue MVIC, peak torque, and hydroxyproline | The 500 mg/day dose reduced post-fatigue MVIC decline only in the stronger half at baseline, with no overall-sample effect. | Supportive |
Receipt — 3 References
All 3 cited sources were verified for existence at the original page (as of 2026-07-11).
Reviewed and approved: Chamgap Editorial Team · Approval date: 2026-07-11 · Corrections: none
Cite this verdict
[Chamgap] Shilajit x improvement of testosterone, sperm, and fatigue — Evidence Grade C·43. 3 cited sources checked. Source: https://health-receipt.pages.dev/en/verdicts/mens/shilajit-testosterone-sperm-fatigue/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.