Few supplements have a research profile as unusual as shilajit. It oozes from Himalayan rocks as a blackish-brown resin formed over centuries from compressed plant matter. It contains over 85 minerals, fulvic acid, humic acid, and dibenzo-alpha-pyrones — a compound class found nowhere else in the supplement world. A 2026 pilot clinical study found that 500 mg daily for 28 days improved leg press strength by 12.9%, reduced fatigue scores by 32.4%, and decreased C-reactive protein by 25.4% in healthy adult males.[1] This article examines what clinical research says about shilajit’s benefits, the right dose, and what to watch for.
What Is Shilajit?
Shilajit (pronounced shi-lah-jit) is a mineral-organic exudate found in high-altitude rock layers across the Himalayas, Altai, and Caucasus mountains. It forms over hundreds to thousands of years as plant matter decomposes under extreme geological pressure. The resulting resin is a complex matrix of organic acids, minerals, and bioactive compounds not fully replicable through synthesis.
The primary active compound is fulvic acid — a short-chain organic acid that acts as a natural chelator, binding minerals and ferrying nutrients into cells. Alongside fulvic acid, shilajit contains dibenzo-alpha-pyrones (DBPs), which have antioxidant properties and support mitochondrial function. These compounds work together rather than independently, which is why whole-extract shilajit often outperforms isolated constituents in research.
Does Shilajit Improve Strength and Physical Performance?
The most current clinical trial on shilajit — a 2026 open-label pilot study published in Cureus — tested 500 mg daily (250 mg twice daily) in 25 healthy men over 28 days.[1] Results were notable across multiple performance metrics:
- One-repetition maximum leg press increased 12.94% (p < 0.001)
- Muscle endurance improved 12.30% (p < 0.001)
- VO2 max rose 1.36% (p < 0.001)
- Grip strength of the dominant hand increased 5.73% (p = 0.038)
- Fatigue Severity Scale scores dropped 32.40% (p < 0.001)
Beyond performance, CRP — a blood marker of inflammation — fell 25.35% (p = 0.023). Lean body mass increased 1.5% while body fat dropped 2.34%. No adverse events occurred, and liver and kidney markers stayed within normal limits throughout.
These are within-group comparisons from a single-arm study, so they carry less evidentiary weight than a placebo-controlled trial. But the magnitude of the changes is substantial and consistent with shilajit’s known mechanisms.
Does Shilajit Increase Testosterone?
Testosterone support is one of shilajit’s most studied benefits. A randomized, double-blind, placebo-controlled trial in Andrologia (2016) enrolled 96 healthy men aged 45 to 55 and gave them either 250 mg of purified shilajit twice daily or placebo for 90 days. The shilajit group showed statistically significant increases in:
- Total testosterone: approximately 20% increase
- Free testosterone: approximately 19% increase
- Dehydroepiandrosterone (DHEA): significant elevation vs. placebo
DHEA is a precursor hormone that the body converts into testosterone and estrogens. Its elevation alongside testosterone suggests shilajit may act upstream in the hormonal pathway rather than directly stimulating production. Fulvic acid is theorized to reduce oxidative stress in Leydig cells — the testicular cells that produce testosterone — which may preserve or enhance their function.
The 2026 pilot study also measured total testosterone and noted trends consistent with these findings, though the open-label design limits interpretation.[1]
Can Shilajit Support Bone Health?
A 2022 randomized, double-blind, placebo-controlled trial tested shilajit specifically in postmenopausal women with osteopenia.[4] The study found shilajit extract reduced oxidative stress, lowered inflammation markers, and preserved bone mineral density in a dose-dependent manner compared to placebo.
Bone loss accelerates when oxidative stress damages osteoblasts (bone-building cells) and tips the balance toward osteoclasts (bone-resorbing cells). Shilajit’s antioxidant compounds may protect osteoblast function and slow this shift.
This adds a dimension to shilajit’s profile beyond the testosterone and performance angles. Bone health is relevant not just to aging women but to anyone at risk of stress fractures, athletes under high training load, and individuals with dietary calcium gaps.
Does Shilajit Support Collagen Synthesis?
A 2024 randomized controlled trial from the University of Nebraska-Lincoln assigned recreationally trained men to 500 mg/day of shilajit, 1000 mg/day, or placebo for 8 weeks.[3] The primary outcome was serum pro-c1alpha1 — a biomarker of Type 1 collagen synthesis.
Both shilajit groups showed large, significant increases in collagen synthesis markers (low dose: p = 0.008, d = 1.2; high dose: p = 0.007, d = 1.3). The placebo group saw no change. Type 1 collagen is the most abundant structural protein in the body, present in skin, tendons, ligaments, bone, and connective tissue.
This finding matters for athletes and active individuals: collagen synthesis is a rate-limiting step in tendon and ligament repair. Supporting this pathway may reduce injury risk and speed recovery from soft-tissue stress.
How Does Shilajit Support Energy?
The proposed energy mechanism centers on mitochondrial function. Fulvic acid is thought to enhance nutrient and oxygen transport into mitochondria, supporting ATP production. Dibenzo-alpha-pyrones may support the electron transport chain directly. Both compounds also neutralize free radicals that would otherwise impair cellular energy metabolism.
The 2026 pilot study captured this indirectly: VO2 max improved alongside fatigue reductions, and CRP dropped — suggesting the energy benefit is partly an inflammation-reduction effect rather than a stimulant-style action.[1] Shilajit does not contain caffeine or other stimulants. Any energy benefit builds over weeks as mitochondrial health and hormonal function improve.
A 2016 transcriptomics study from Ohio State University tested 250 mg twice daily for 8 weeks in overweight adults.[2] Muscle biopsies showed significant upregulation of extracellular matrix genes — tenascin XB, decorin, collagen, elastin, fibronectin — that govern muscle elasticity, repair, and regeneration. This gene expression profile suggests shilajit supports tissue remodeling rather than acutely boosting output.
How to Take Shilajit
Clinical studies have used a range of doses:
| Study | Dose | Duration | Outcome |
|---|---|---|---|
| Yadav 2026 | 500 mg/day (2x250) | 28 days | Strength, endurance, fatigue |
| Andrologia testosterone trial | 500 mg/day (2x250) | 90 days | Testosterone, DHEA |
| Nebraska collagen trial | 500-1000 mg/day | 8 weeks | Collagen synthesis |
| Osteopenia trial | Study dose | 90 days | Bone mineral density |
Recommended dose: 250 to 500 mg of purified shilajit extract daily. Split into two doses for consistent blood levels. Take with water; some evidence suggests absorption improves with warm water. Avoid taking with high-calcium foods, as calcium may compete with fulvic acid’s mineral transport.
Form matters. Purified resin or standardized extract outperforms raw shilajit. Raw shilajit from unverified sources may contain heavy metals — lead, arsenic, mercury — that accumulate in geological rock layers. Only buy products tested for heavy metal content by a third-party lab.
Side Effects and Safety
Purified shilajit extract at 250 to 500 mg daily has demonstrated a strong safety profile across multiple clinical trials spanning 28 to 90 days. No serious adverse events have been reported in published studies. Liver, kidney, and hematological markers stayed within normal limits in the 2026 pilot study.[1]
Potential concerns to note:
- Raw/unpurified shilajit: May contain heavy metals. Only use purified, lab-verified products.
- Hemochromatosis: Shilajit enhances iron absorption via fulvic acid. People with iron overload disorders should avoid it or use with medical supervision.
- Gout: Shilajit may raise uric acid in susceptible individuals.
- Hormone-sensitive conditions: Given its effect on testosterone and DHEA, people with hormone-sensitive cancers should consult a physician.
- Pregnancy and breastfeeding: Insufficient safety data. Avoid until more evidence exists.
Frequently Asked Questions
What are the main benefits of shilajit? Clinical research supports muscle strength and endurance improvements, potential testosterone support, increased collagen synthesis, and bone mineral density preservation.
Does shilajit increase testosterone? A randomized, placebo-controlled trial found 500 mg/day for 90 days significantly increased total testosterone, free testosterone, and DHEA in men aged 45 to 55.
How much shilajit should I take per day? Most clinical studies use 250 to 500 mg daily, often split into two doses. Always use purified extract from third-party-tested products.
How long does shilajit take to work? Performance and energy changes may appear within 28 days. Testosterone and bone density effects have been measured at 90 days.
Is shilajit safe to take every day? Purified shilajit extract appears safe for up to 90 days in clinical studies. Avoid raw or unpurified forms due to heavy metal risk.
Related Reading
- Cordyceps Benefits: Energy, Performance, and Immunity
- Creatine and Tongkat Ali: The Ultimate Muscle-Building Stack?
- L-Carnitine Dosage: How Much to Take for Fat Loss
References
[1] Yadav D, Mishra S, Shah KM, et al. (2026). Safety and Efficacy of TruBlk™ Shilajit Resin Supplementation on Physical Performance and Blood Biomarkers in Healthy Adults: A 28-Day Open-Label Pilot Study. Cureus, 18(1):e102372. PMID 41613504
[2] Das A, Datta S, Rhea B, et al. (2016). The Human Skeletal Muscle Transcriptome in Response to Oral Shilajit Supplementation. J Med Food, 19(7):701-9. PMID 27414521
[3] Neltner TJ, Sahoo PK, Smith RW, et al. (2024). Effects of 8 Weeks of Shilajit Supplementation on Serum Pro-c1alpha1, a Biomarker of Type 1 Collagen Synthesis: A Randomized Control Trial. J Diet Suppl, 21(1):1-12. PMID 36546868
[4] Shilajit extract reduces oxidative stress, inflammation, and bone loss to dose-dependently preserve bone mineral density in postmenopausal women with osteopenia: A randomized, double-blind, placebo-controlled trial. (2022). PMID 35933897