Shilajit — also called mumijo, mineral pitch, or salajeet — is a resinous exudate compressed in high-altitude rock formations across the Himalayas, Altai, and Caucasus mountains. Formed over centuries from decomposed plant and microbial matter, it contains fulvic and humic acids, dibenzo-alpha-pyrones, and a spectrum of trace minerals. Interest in shilajit has grown steadily as people seek natural support for energy, testosterone levels, and cognitive clarity.
That interest makes honest safety information more important, not less. Most shilajit research consists of small-scale human pilots, animal models, and isolated case reports — so certainty about long-term effects in diverse populations remains limited. This article reviews what the available evidence genuinely shows about side effects, contamination hazards, and the groups of people who have the strongest reasons to avoid or approach shilajit with extra caution.
Key Takeaways
- Heavy metal contamination — including thallium — is the most documented consumer risk; only use products with independent third-party lab testing [1][2].
- A case report links shilajit consumption during pregnancy to pseudohyperaldosteronism; pregnant and breastfeeding women should avoid it [3].
- Short-term studies in healthy adults show an acceptable safety profile at moderate doses, but long-term human safety data is absent [4][5].
- People with kidney disease, liver conditions, or those taking prescription medications should consult a physician before using shilajit.
- Animal data suggests some hepatoprotective and gastroprotective effects, but these should not be extrapolated to assume safety in people with pre-existing conditions [6][7].
Heavy Metal Contamination: The Most Documented Risk
Shilajit is a geological product, and that origin is a double-edged sword. The same rock-and-soil environment that deposits fulvic acids and trace minerals also concentrates heavy metals such as lead, arsenic, cadmium, and mercury. A 2024 review found that shilajit samples can carry hazardous heavy metals alongside their beneficial humic substances, and that the balance between advantage and toxicity depends heavily on sourcing, processing, and purification [1].
Thallium is a particularly concerning contaminant. A 2025 study analyzed commercial shilajit products and detected quantifiable thallium — a highly toxic heavy metal with no known biological benefit — in shilajit and its supplements, raising questions about consumer exposure with regular use [2]. Thallium accumulates in the body and can damage the nervous system, kidneys, and hair follicles even at relatively low doses over time.
Raw or minimally processed shilajit carries the highest contamination risk. Reputable manufacturers use purification steps — resin washing, aqueous extraction, and independent heavy-metal testing — to reduce these levels, but regulatory oversight of dietary supplements is inconsistent, and not every product on the market is third-party verified. If you choose to use shilajit, a certificate of analysis showing heavy-metal testing results is the baseline minimum, not an optional extra.
The Pregnancy Warning: A Documented Case Report
One of the clearest human safety signals for shilajit involves pregnancy. A 2018 case report described a pregnant woman who developed pseudohyperaldosteronism — a syndrome resembling excess aldosterone activity, with elevated blood pressure, low potassium, and hormonal disruption — after consuming mumijo (shilajit) during pregnancy [3]. The clinical presentation was similar to what is seen with high-dose licorice root, which is known to interfere with cortisol metabolism via inhibition of 11-beta-hydroxysteroid dehydrogenase.
This is a single case report, not a controlled trial, and definitive causation cannot be established from one case. However, the potential severity of the outcome — elevated blood pressure in pregnancy carries serious risks for both mother and fetus — makes this finding sufficient reason for pregnant women to avoid shilajit entirely until more data are available. Breastfeeding women should apply the same caution, as the transfer of shilajit constituents into breast milk has not been studied in any published research.
What Short-Term Studies Show in Healthy Adults
The available human safety data for purified shilajit is limited in scope but generally reassuring for healthy, non-pregnant adults at moderate doses over short durations. A 2026 open-label pilot found that 28 days of TruBlk™ shilajit resin supplementation in healthy adults did not produce clinically significant adverse changes in blood biomarkers, suggesting an acceptable short-term safety profile at the dose studied [4]. The open-label design and small sample size mean these findings should not be over-interpreted.
Animal data from a 91-day repeated-administration study in rats found no significant toxicological findings with black shilajit at the doses tested, including no notable effects on organ weights or blood chemistry [5]. Rodent safety data does not translate directly to humans, but the absence of toxicity signals at extended dosing provides some moderate reassurance. Crucially, neither of these studies addressed long-term use beyond three months or involved populations with pre-existing health conditions.
Liver and Gastric Considerations: Reading Animal Data Carefully
Several animal studies have examined shilajit’s effects on the liver and stomach. A 2026 study found that a shilajit extract protected against acetaminophen-induced liver injury in mice, appearing to modulate inflammatory and cell-death signaling pathways [6]. A separate rat study showed that shilajit had treatment effects on aspirin-induced gastric lesions, suggesting some gastroprotective activity in that model [7].
These findings are scientifically interesting, but they should not be read as safety assurances for people with existing liver or gastrointestinal disease. Animal models of drug-induced injury differ substantially from chronic human conditions, and the preparations and doses used in laboratory studies may not reflect commercially available products. People with liver disease, chronic gastritis, or peptic ulcer disease should consult a physician rather than extrapolating from rodent gastroprotection data.
Interactions with Medications and Cancer Treatment
Shilajit’s effects on drug metabolism pathways have not been systematically studied in humans. One animal study found that shilajit mitigated chemotherapy-induced testicular toxicity by modulating steroidogenesis and Nrf-2/Keap-1 antioxidant signaling [8]. While this may eventually be relevant to supportive oncology research, it also highlights a real concern: shilajit is biologically active and may interact with prescription drugs — including chemotherapy agents — in ways that are poorly understood and have not been characterized in clinical trials.
Anyone taking immunosuppressants, antihypertensives, blood thinners, or undergoing cancer treatment should discuss shilajit use with their prescribing physician before starting. The absence of human interaction data is itself a reason for caution — not a reason to assume safety.
Who Should Avoid Shilajit
Based on the available evidence, several groups have clear reasons to avoid shilajit or use it only under medical supervision. Pregnant women face a documented risk of hormonal disruption [3]. Breastfeeding women lack any safety data on transfer to infants. People with chronic kidney disease face elevated risk from heavy metal accumulation, given the contamination risks documented in the literature [1][2]. Anyone with active liver disease should not assume protection from animal hepatoprotection studies.
Children should not take shilajit, as no pediatric safety data exists. People with autoimmune conditions should be cautious, since shilajit’s immunomodulatory properties are not well characterized in that context. Anyone on prescription medication — particularly antihypertensives, anticoagulants, or drugs with narrow therapeutic windows — should consult a doctor before use. Shilajit is a bioactive resin with real physiological effects, and those effects can be harmful in the wrong context or with the wrong product.
🛒 Where to Buy Shilajit
- Pürblack Live ResinLab-tested / studied
resin, ~300-500 mg/day — Premium purified resin, third-party heavy-metal tested; widely regarded as a reference-quality resin. - Nootropics Depot PrimaVie ShilajitClinically studied
capsules, 250 mg — PrimaVie, the standardised shilajit extract used in published human trials. - Zazzee Shilajit 40:1 Extract
capsules, 40:1 extract — Standardised to 50% fulvic acid. - Swanson Shilajit Extract
capsules, 400 mg, 60 count — Budget option from a long-established supplement brand.
As an Amazon Associate we earn from qualifying purchases. Shilajit quality varies widely — always choose a product with a published third-party heavy-metal test (COA) before buying.
A Note on the Evidence
Most shilajit research is preliminary — drawn from small human pilots, rodent studies, and isolated case reports — so the full safety picture, especially with long-term use, remains incomplete. People who are pregnant, breastfeeding, have kidney or liver disease, take prescription medications, or are undergoing cancer treatment should consult a qualified healthcare provider before using shilajit; nothing in this article constitutes medical advice.
Frequently Asked Questions
Is shilajit safe to take every day?
Short-term human data — including a 28-day pilot in healthy adults — did not identify significant adverse blood biomarker changes at the studied dose [4], and a 91-day rat study showed no notable toxicological signals [5]. However, daily long-term use in humans has not been studied, and safety depends critically on product purity and the absence of heavy metal contamination.
Can shilajit cause heavy metal poisoning?
Impure or raw shilajit can contain hazardous levels of heavy metals including lead, arsenic, and thallium [1][2]. Thallium in particular has been quantified in commercial shilajit supplements and accumulates in the body over time. Choosing products with independent third-party heavy-metal certification significantly reduces, but may not entirely eliminate, this risk.
Why should pregnant women avoid shilajit?
A 2018 case report documented a pregnant woman developing pseudohyperaldosteronism — characterized by elevated blood pressure, low potassium, and hormonal disruption — after consuming mumijo (shilajit) during pregnancy [3]. Because high blood pressure in pregnancy carries serious risks for both mother and fetus, avoidance is the prudent approach until controlled safety data for this population exists.
Can shilajit interact with my medications?
Shilajit modulates several biological signaling pathways, including antioxidant and inflammatory cascades relevant to drug metabolism [6][8]. Formal human drug-interaction studies do not yet exist. Anyone on prescription medications — especially antihypertensives, anticoagulants, immunosuppressants, or chemotherapy — should consult a physician before adding shilajit to their regimen.
Does shilajit damage the liver?
Animal data suggests shilajit may have hepatoprotective properties in models of drug-induced liver injury [6]. These are animal studies, however, and they do not address effects in people with chronic liver disease. Anyone with a liver condition should seek medical guidance rather than assuming protection based on rodent research.
Is raw shilajit more dangerous than processed shilajit?
Yes, generally. Raw shilajit carries a higher risk of heavy metal contamination and microbial impurities. The heavy-metal concerns documented in published research are particularly acute for unprocessed forms [1]. Purified shilajit from manufacturers who perform aqueous extraction and third-party metal testing presents a meaningfully lower contamination risk, though no form eliminates the need for product verification.
References
- Hussain A et al. Hazardous or Advantageous: Uncovering the Roles of Heavy Metals and Humic Substances in Shilajit (Phyto-mineral) with Emphasis on Heavy Metals Toxicity and Their Detoxification Mechanisms. Biological trace element research (2024). PMID 38393486
- Kamgar E et al. Quantifying of thallium in Shilajit and its supplements to unveil the potential risk of consumption of this popular traditional medicine. BMC chemistry (2025). PMID 39827344
- Stavropoulos K et al. Pseudohyperaldosteronism due to mumijo consumption during pregnancy: a licorice-like syndrome. Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology (2018). PMID 29933704
- Yadav D et al. 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
- Velmurugan C et al. Evaluation of safety profile of black shilajit after 91 days repeated administration in rats. Asian Pacific journal of tropical biomedicine (2012). PMID 23569899
- He SQ et al. Shilajit extract (ZhaXun) protects against acetaminophen-induced liver injury via modulation of the NF-κB/AKT/Caspase-3 axis. Journal of ethnopharmacology (2026). PMID 40957543
- Ghasemkhani N et al. Treatment effects of Shilajit on aspirin-induced gastric lesions in rats. Physiological reports (2021). PMID 33818003
- Rajpoot A et al. Shilajit mitigates chemotherapeutic drug-induced testicular toxicity: Study on testicular germ cell dynamics, steroidogenesis modulation, and Nrf-2/Keap-1 signaling. Journal of Ayurveda and integrative medicine (2024). PMID 39121783
These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. Content is for informational purposes only and is not medical advice; consult a qualified healthcare provider before starting any supplement. As an Amazon Associate we earn from qualifying purchases.
