In the thin air of the Himalayas, something dark and tar-like oozes from between the rocks every summer. For at least 3,000 years, Ayurvedic healers have scraped it up and called it shilajit — Sanskrit for “destroyer of weakness.” Modern researchers looked at that sticky resin and asked the blunt question any skeptic would: is there anything real here, or is this just very old marketing? Two decades of clinical trials later, the answer is genuinely surprising. The same substance that made exhausted rats swim longer and stabilized their mitochondria has now been tested in humans — and it moved the needle on testosterone, bone density, and muscle in peer-reviewed, double-blind studies.
📋 Simple Summary
Shilajit is a black, tar-like resin that seeps from rocks in the Himalayas and other mountain ranges. It forms over centuries as plants decay and compress under rock, leaving behind a concentrate of fulvic acid, minerals, and plant compounds. Ayurvedic medicine has used it for thousands of years as a general “rejuvenator.” The modern evidence is better than most people expect: in double-blind human trials, purified shilajit raised testosterone in middle-aged men, slowed bone loss in postmenopausal women, and helped men keep muscle strength when fatigued — all while turning on genes that build collagen. The honest catches: it has never been shown to extend human life, and raw, unpurified shilajit can be contaminated with heavy metals. Used properly — purified, standardized, and at the right dose — shilajit is one of the more genuinely well-tested natural supplements in the longevity toolkit.
The detailed breakdown continues below for those who want the full science.
Published: August 16, 2026
Evidence Tier: 🥇 Gold — multiple double-blind, placebo-controlled human trials across testosterone, bone, and muscle, backed by a consistent mitochondrial mechanism
Category: Supplements & Compounds
⚖️ At a Glance: Pros & Cons
⚠️ We are researchers, not doctors. Nothing on this page is medical advice. Talk to your doctor before taking any supplement. The information below is for education only.
✅ Pros (What the Evidence Supports)
- Strongest benefit: In a double-blind, placebo-controlled trial, purified shilajit (500 mg/day for 90 days) significantly raised total and free testosterone in men aged 45–55 (PMID 26395129).
- Bone preservation: A 48-week RCT in postmenopausal women with osteopenia found shilajit dose-dependently preserved spine and hip bone density while reducing markers of bone breakdown (PMID 35933897).
- Mitochondrial support: Standardized shilajit stabilized the mitochondrial energy complexes (I, II, IV, V) and membrane potential in stressed animals, and preserved muscle strength during fatigue in humans (PMID 22771318, PMID 30728074).
- Connective-tissue signal: In human muscle and skin, shilajit upregulates extracellular-matrix and collagen genes — tenascin, decorin, elastin, fibrillin, fibronectin (PMID 27414521, PMID 31161927).
❌ Cons (What the Evidence Doesn’t Support or Warns About)
- Biggest limitation: There is zero human evidence that shilajit extends lifespan — its “anti-aging” reputation rests on mechanism (mitochondria, antioxidants, collagen), not on longevity outcomes.
- Contamination risk: Raw, unpurified shilajit can carry heavy metals and other contaminants; only purified, standardized extracts have been safety-tested in clinical trials.
- Small or open-label trials: Several human studies are small or single-arm, and the testosterone finding has not yet been independently replicated at large scale.
- Hormonal effects: Because it raises testosterone and DHEAS, men with hormone-sensitive conditions (such as prostate issues) should talk to a doctor before using it.
What Is Shilajit?
Shilajit is a herbo-mineral resin — a dark brown-to-black, tar-like substance that oozes from rock crevices in the Himalayas, the Caucasus, the Altai, and other mountain ranges during the warm summer months. In different traditions it goes by different names: shilajit in India, mumie (or mummiyo) in Russia and Central Asia, and Tasmayi in Kazakh medicine (PMID 23668027). The name shilajit is usually translated as “conqueror of mountains and destroyer of weakness.”
Where does it come from? For a long time this was debated, but modern analysis has settled the question. Shilajit forms over centuries as plant matter decomposes and is slowly compressed and transformed under rock. A 2026 study using DNA metabarcoding identified 50 plant taxa in processed shilajit — including members of the Apiaceae (carrot) and Asteraceae (daisy) families — confirming its botanical origin (PMID 42496934).
Chemically, shilajit is a dense mix of three main groups of molecules:
- Fulvic acid (roughly 56–80% by weight, depending on source) — small, highly active molecules that act as carriers and antioxidants.
- Dibenzo-α-pyrones (DBPs) and their chromoprotein complexes — plant-derived compounds thought to support mitochondria.
- Humic acid, minerals, and phenolic acids — shilajit contains 80+ minerals in trace amounts, plus plant antioxidants. A 2026 HPLC analysis found gallic acid is the most abundant phenolic, reaching up to 2,839 µg per gram, alongside vanillic, syringic, caffeic, ferulic, chlorogenic, and rosmarinic acids (PMID 41699045).
In Ayurveda, shilajit is classified as a rasayana — a “rejuvenator” used to promote longevity, strength, and overall vitality. For a long time, Western medicine dismissed this as folklore. The clinical trials of the last fifteen years suggest that dismissal was premature.
How It Works
The core of shilajit’s proposed anti-aging action is its effect on mitochondria — the tiny power plants inside your cells that convert food into usable energy. Mitochondrial function declines with age, and that decline is one of the recognized “hallmarks of aging.”
The key players are fulvic acid and the dibenzo-α-pyrones. Fulvic acid’s small molecules can shuttle electrons and carry nutrients into tissues, and the dibenzo-α-pyrones appear to act as co-factors for the mitochondrial electron transport chain — the assembly line that produces ATP, your cells’ energy currency. In a 2012 study, shilajit (standardized to 0.43% DBPs and 56.75% fulvic acid) prevented the collapse of mitochondrial complexes I, II, IV, and V and preserved mitochondrial membrane potential in the brains of chronically stressed rats (PMID 22771318). A much older Soviet study from 1978 found the same broad pattern: “mumie” increased mitochondrial respiration across metabolic states (PMID 664476).
On top of that mitochondrial support, shilajit shows several other effects relevant to aging:
- Antioxidant and anti-inflammatory: In human trials it lowered malondialdehyde (MDA, a marker of oxidative damage) and raised glutathione (GSH), while reducing the inflammatory marker hsCRP (PMID 20078516, PMID 35933897).
- Collagen and connective-tissue gene expression: Eight weeks of shilajit upregulated 17 extracellular-matrix genes in human muscle — tenascin XB, decorin, myoferlin, collagen, elastin, fibrillin 1, and fibronectin 1 (PMID 27414521). A companion study in middle-aged women found the same signature in skin, with induction of microvascular and extracellular-matrix mechanisms (PMID 31161927).
- Energy and anti-fatigue: The Stohs safety review summarizes animal and human data supporting shilajit as a “revitalizer” that enhances physical performance and relieves fatigue with enhanced ATP production (PMID 23733436).
- Hormonal support: Shilajit raised total and free testosterone and DHEAS in middle-aged men while leaving LH and FSH (the pituitary signals that drive the testes) well maintained — meaning it appears to support natural production rather than disrupting the feedback loop (PMID 26395129).
Put simply: shilajit’s evidence points at three things that decline with age — mitochondrial energy output, connective-tissue integrity, and (in men) androgen levels — and suggests it may gently support all three.
The Longevity Connection
🍖 Testosterone and male aging. This is shilajit’s most famous and best-tested claim. Testosterone declines gradually in men after about age 30, and low levels are linked to fatigue, lost muscle, low mood, and poorer metabolic health. In a randomized, double-blind, placebo-controlled trial, healthy men aged 45–55 who took 250 mg of purified shilajit twice daily for 90 days showed significant increases in total testosterone, free testosterone, and DHEAS compared with placebo (PMID 26395129). An earlier trial in infertile men with low sperm counts found a 23.5% rise in serum testosterone plus improved sperm count and motility after 90 days (PMID 20078516).
🦴 Bone density. Bone loss accelerates with age, especially after menopause. The strongest bone evidence for shilajit is a 48-week randomized, double-blind, placebo-controlled trial in 60 postmenopausal women with osteopenia: while the placebo group’s spine and hip bone density progressively declined, the women taking 250 or 500 mg/day of shilajit extract showed dose-dependent preservation, with significantly better changes at both 24 and 48 weeks. Markers of bone breakdown (CTX-1, RANKL) fell and the protective marker OPG rose in the shilajit groups only (PMID 35933897).
💪 Muscle, fatigue, and recovery. In 63 recreationally active men, 8 weeks of high-dose shilajit (500 mg/day, PrimaVie®) significantly reduced the drop in maximal muscle strength after an exhausting exercise protocol — the high-dose group lost 8.9% of strength versus 16–17% in the placebo and low-dose groups (PMID 30728074). A separate human study found shilajit upregulated collagen and structural genes in muscle (PMID 27414521), and a 2024 RCT linked it to increased serum Pro-C1α1, a marker of type 1 collagen synthesis (PMID 36546868).
🔋 Mitochondria and energy — the core anti-aging story. Because mitochondrial decline is a hallmark of aging, shilajit’s ability to stabilize mitochondrial complexes and membrane potential (PMID 22771318) is the mechanism that most directly supports its longevity reputation. The 1978 finding that mumie increased mitochondrial respiration (PMID 664476) and the Stohs review’s conclusion that shilajit enhances ATP production (PMID 23733436) point the same direction.
🧠 Brain and cognition. The evidence here is early but consistent. A 2012 review proposed shilajit (and its active principle fulvic acid) as a novel nutraceutical for Alzheimer’s prevention, describing a clinical trial combining shilajit with B vitamins in patients with mild Alzheimer’s (PMID 23131823). Shilajit reversed anxiety and fatigue behavior and preserved brain mitochondrial function in a rat model of chronic fatigue syndrome (PMID 22771318), and it has been traditionally used to counter the brain fog and fatigue of high altitude (PMID 20532096).
🫁 Metabolic and liver health. In rats with diet-induced non-alcoholic fatty liver disease, shilajit reduced liver enzymes, triglycerides, LDL, glucose, and liver fat while raising HDL (PMID 32083445). A 2026 study in the Journal of Ethnopharmacology found a Tibetan shilajit extract (ZhaXun) protected against acetaminophen-induced liver injury by modulating the NF-κB/AKT/caspase-3 axis (PMID 40957543).
🛡️ Cancer — early and unproven. A 2026 systematic review found nine preclinical studies (eight in vitro, one in vivo) showing shilajit has dose-dependent cytotoxicity against cancer cells with selectivity over normal cells, acting through reactive oxygen species and NF-κB inhibition — but it explicitly found no human clinical studies (PMID 41640940). Treat this as research, not a recommendation.
Key Studies
| Study | Design | Key Finding |
|---|---|---|
| Pandit 2016 (PMID 26395129) | Human RCT, double-blind, placebo (90 days) | 250 mg twice daily significantly raised total testosterone, free testosterone, and DHEAS in men aged 45–55, with LH/FSH maintained. |
| Pingali 2022 (PMID 35933897) | Human RCT, double-blind, placebo (48 weeks, n=60) | Dose-dependently preserved spine and hip bone density in postmenopausal women with osteopenia; reduced bone-breakdown markers and oxidative stress. |
| Biswas 2010 (PMID 20078516) | Human clinical trial, 90 days (n=35 enrolled) | 100 mg twice daily improved sperm count (+61.4%), motility, and testosterone (+23.5%) in oligospermic men, with reduced oxidative stress. |
| Keller 2019 (PMID 30728074) | Human RCT (8 weeks, n=63) | 500 mg/day (PrimaVie®) significantly reduced fatigue-induced strength loss vs. placebo in recreationally active men. |
| Das 2016 (PMID 27414521) | Human muscle-biopsy study | 8 weeks upregulated 17 extracellular-matrix genes (collagen, elastin, fibrillin, fibronectin, decorin) in skeletal muscle. |
| Collagen RCT 2024 (PMID 36546868) | Human RCT (8 weeks) | 500 mg/day shilajit studied for its effect on serum Pro-C1α1, a biomarker of type 1 collagen synthesis. |
| Surapaneni 2012 (PMID 22771318) | Rat model of chronic fatigue | Shilajit stabilized mitochondrial complexes I/II/IV/V and membrane potential and reversed fatigue/anxiety behavior. |
| Stohs 2014 (PMID 23733436) | Safety & efficacy review | Concluded shilajit’s safety is well documented and it acts as antioxidant, anti-inflammatory, adaptogen, and energizer via DBPs and fulvic acid. |
| NAFLD rat study 2020 (PMID 32083445) | High-fat-diet rats | Reduced liver enzymes, triglycerides, LDL, glucose, and liver fat while raising HDL in fatty-liver rats. |
| Cancer review 2026 (PMID 41640940) | Systematic review (9 preclinical studies) | Preclinical data show selective, dose-dependent cancer-cell cytotoxicity — but no human clinical studies exist. |
Dosing and Safety
There is no single established “optimal” dose, because different trials have used different preparations for different goals. The human data supports this range:
| Goal | Dose Used in Trials | Notes |
|---|---|---|
| Testosterone / male vitality | 250 mg twice daily (500 mg/day) | 90-day trial in men 45–55 (PMID 26395129). |
| Bone density | 250–500 mg/day | 48-week trial; higher dose trended better (PMID 35933897). |
| Muscle / fatigue / recovery | 500 mg/day (PrimaVie®) | 8-week trial; the 250 mg/day low dose did not separate from placebo (PMID 30728074). |
| Sperm quality | 100 mg twice daily (200 mg/day) | 90-day trial in oligospermic men (PMID 20078516). |
Safety notes:
- Purification is non-negotiable. Raw shilajit harvested directly from rocks is not the same as what was tested in trials. Unpurified shilajit can be contaminated with heavy metals, fungi, and other impurities. The human trials used purified, standardized extracts — most commonly PrimaVie®. Look for a standardized product with a stated fulvic-acid and dibenzo-α-pyrone content.
- Tolerability is good. The Stohs review concludes shilajit’s safety is “well documented” based on animal and human studies (PMID 23733436), and human trials running up to 48 weeks at 500 mg/day reported no serious adverse events.
- Hormone-sensitive conditions. Because shilajit raises testosterone and DHEAS, men with prostate conditions or anyone with a hormone-sensitive cancer should consult a doctor before use.
- Blood sugar. Shilajit lowered glucose in animal studies of fatty liver (PMID 32083445) and has traditional antidiabetic use — people on diabetes medication should monitor blood sugar if combining.
- Rare allergic reactions. At least one case report describes exercise-induced anaphylaxis where an Ayurvedic preparation was a cofactor (PMID 30863761). Allergic reactions appear rare but are possible.
- Pregnancy and breastfeeding. No safety data exists; avoid.
❓ Common Questions About Shilajit
What is shilajit and how does it work?
Shilajit is a black, tar-like resin that seeps from rocks in the Himalayas and other mountains, formed over centuries from decayed plant matter. It is rich in fulvic acid, minerals, and plant compounds called dibenzo-α-pyrones. These appear to support your mitochondria — the power plants inside cells — by stabilizing the energy-producing complexes, while also acting as antioxidants and turning on genes that build collagen.
What does the evidence actually show?
The evidence is 🥇 Gold for a supplement: multiple double-blind, placebo-controlled human trials. Purified shilajit raised testosterone in men aged 45–55, preserved bone density in postmenopausal women over 48 weeks, and reduced fatigue-related strength loss in active men. What it has NOT shown is any extension of human lifespan — that claim is an inference from the mitochondrial and antioxidant mechanisms, not a proven outcome.
What’s the right dose?
Human trials have used 200–500 mg per day of purified extract, depending on the goal — 500 mg/day for testosterone and muscle/fatigue, 250–500 mg/day for bone. Most well-known products use a standardized extract like PrimaVie®. Always use a purified, standardized product rather than raw resin, and take it with food.
What are the risks and side effects?
In trials up to 500 mg/day for up to 48 weeks, shilajit was well tolerated with no serious side effects. The biggest real-world risk is not the extract itself but contamination — raw, unpurified shilajit can contain heavy metals, so only use purified, standardized products. Rare allergic reactions have been reported, and it may lower blood sugar.
Who should avoid it?
Pregnant and breastfeeding women should avoid shilajit, since there is no safety data. Men with prostate conditions or anyone with a hormone-sensitive cancer should talk to a doctor first, because shilajit raises testosterone. People on diabetes medication should monitor blood sugar, since shilajit may lower it.
The Bottom Line
Shilajit is one of the rare “ancient remedy” stories that holds up under modern scrutiny. It has multiple double-blind, placebo-controlled human trials — which is more than most longevity supplements can claim — and those trials produced consistent, mechanism-aligned results: higher testosterone in aging men, preserved bone density in postmenopausal women, better muscle strength under fatigue, and upregulation of collagen genes. The mitochondrial mechanism that underlies these effects is also the most plausible route by which shilajit could matter for aging itself.
But be clear-eyed about what the evidence does not show. No study has demonstrated that shilajit extends human life or slows biological aging, and some of the human trials are small or have not been independently replicated at scale. The single most important practical point is product quality: the benefits were shown with purified, standardized extracts (most often PrimaVie®), not raw resin, which can carry heavy metals. We rate shilajit 🥇 Gold for its specific tested outcomes — hormones, bone, muscle, and mitochondrial support — with the caveat that “longevity” itself remains an inference.
Who it’s for: men in their 40s–60s interested in supporting testosterone and energy; postmenopausal women concerned about bone density; and anyone curious about a well-tested mitochondrial-support supplement. If you take it, buy a purified standardized extract, stick to the 200–500 mg/day range used in trials, and keep expectations grounded: shilajit is a genuine, evidence-backed supplement — not a fountain of youth.
Medical Disclaimer: This content is for educational purposes only and does not constitute medical advice. Shilajit supplements are not approved to treat, cure, or prevent any disease. Always consult a qualified healthcare provider before starting any supplement, especially if you have a hormone-sensitive condition, diabetes, take prescription medication, or are pregnant or breastfeeding. Read our full disclaimer →
Sources
- Pandit S, Biswas S, Jana U, et al. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia. 2016. PMID 26395129
- Pingali U, Nutalapati C, Koilagundla N, et al. 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. Phytomedicine. 2022. PMID 35933897
- Biswas TK, Pandit S, Mondal S, et al. Clinical evaluation of spermatogenic activity of processed Shilajit in oligospermia. Andrologia. 2010. PMID 20078516
- Keller JL, Housh TJ, Hill EC, et al. The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels. J Int Soc Sports Nutr. 2019. PMID 30728074
- Das A, El Masry MS, Gnyawali SC, et al. The Human Skeletal Muscle Transcriptome in Response to Oral Shilajit Supplementation. J Med Food. 2016. PMID 27414521
- Pingali U, Nutalapati C, Koilagundla N, et al. Skin Transcriptome of Middle-Aged Women Supplemented With Natural Herbo-mineral Shilajit Shows Induction of Microvascular and Extracellular Matrix Mechanisms. J Am Coll Nutr. 2019. PMID 31161927
- Effects of 8 Weeks of Shilajit Supplementation on Serum Pro-c1α1, a Biomarker of Type 1 Collagen Synthesis: A Randomized Control Trial. J Diet Suppl. 2024. PMID 36546868
- Surapaneni DK, Adapa SR, Preeti K, et al. Shilajit attenuates behavioral symptoms of chronic fatigue syndrome by modulating the hypothalamic-pituitary-adrenal axis and mitochondrial bioenergetics in rats. J Ethnopharmacol. 2012. PMID 22771318
- Stohs SJ. Safety and efficacy of shilajit (mumie, moomiyo). Phytother Res. 2014. PMID 23733436
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- Shilajit as a Natural Product from Sedimentary Rocks: Biological Origin and Antioxidant Properties. Biochem Genet. 2026. PMID 42496934
- Plant-derived phenolic acids in Shilajit: a comparative HPLC-MS/MS analysis across five regions. Sci Rep. 2026. PMID 41699045
- Pre-clinical Evaluation of Shilajit in Cancer: A Systematic Review. Cureus. 2026. PMID 41640940
- Shilajit extract (ZhaXun) protects against acetaminophen-induced liver injury via modulation of the NF-κB/AKT/Caspase-3 axis. J Ethnopharmacol. 2026. PMID 40957543
- Hepatoprotective effects of Shilajit on high fat-diet induced non-alcoholic fatty liver disease (NAFLD) in rats. Horm Mol Biol Clin Investig. 2020. PMID 32083445
- Antioxidant, cytotoxic and hyperalgesia-suppressing activity of a native Shilajit obtained from Bahr Aseman mountains. Pak J Pharm Sci. 2019. PMID 31813884
- Shilajit: A panacea for high-altitude problems. Int J Ayurveda Res. 2010. PMID 20532096
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- [Effect of the nonspecific biogenic stimulators pentoxyl and mumie on metabolic processes]. Vopr Med Khim. 1978. PMID 664476
- Exercise-induced anaphylaxis with an Ayurvedic drug as cofactor: A case report. World J Clin Cases. 2019. PMID 30863761
- 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. 2026. PMID 41613504