Shilajit’s negative reviews split cleanly into two very different categories: people who didn’t feel anything, and people who are rightly worried about what’s actually inside the resin they bought. The second category is the one worth taking seriously before you ever place an order.
Key Takeaways
- Heavy metal contamination is the most serious, most documented complaint category, not a fringe concern[1][3]
- A 2025 study found some processed shilajit supplements had HIGHER thallium levels than raw, unprocessed shilajit[3]
- Most brands test only for the “big four” metals (lead, arsenic, mercury, cadmium) and miss thallium entirely[3]
- Batch-to-batch inconsistency in color, taste, and effect is common since shilajit is a naturally variable substance, not a manufactured compound[1]
- Buying only third-party lab-tested products with a certificate of analysis (COA) is the consistent expert recommendation[1][2]
Heavy Metal Contamination: The Complaint That Actually Matters
This is the recurring theme across expert sources, not just anecdotal reviews. Cleveland Clinic notes that raw shilajit may contain aluminum, arsenic, cadmium, mercury, and other toxic substances[1]. A Banner Health expert was blunt about the market: “There are a lot of counterfeit products on the market,” some containing lead, fungus, and other contaminants[2]. Purification doesn’t automatically fix this, in fact a 2025 study found some store-bought shilajit supplements had thallium levels up to 0.5 micrograms per gram, higher than the levels found in crude, unprocessed shilajit[3]. Thallium is particularly concerning because it builds up slowly, meaning poisoning symptoms (tiredness, brain fog, mood changes, kidney problems) are easy to mistake for something else entirely until real damage has occurred[3]. Making this worse: most brands only test for the “big four” metals (lead, arsenic, mercury, cadmium), and thallium often slips through screening entirely[3].
Quality and Batch Inconsistency
Because shilajit is a naturally occurring substance rather than a synthesized compound, its composition genuinely varies by location, altitude, and processing, which shows up in reviews as inconsistent color, taste, and perceived potency between batches and brands[1]. This isn’t necessarily a sign of fraud, but it does mean one good experience with a brand doesn’t guarantee the next batch will be identical.
“Didn’t Notice Anything” Complaints
Separate from the safety concerns, a real share of negative reviews are simply about lack of felt effect after weeks of use. This lines up with the state of the actual research: most shilajit studies are small-scale with methodological limitations, leaving a real gap between marketing claims and what’s been rigorously proven[1].
How to Actually Reduce Your Risk
The consistent expert guidance across sources: only buy shilajit that comes with an independent, third-party certificate of analysis (COA) specifically testing for heavy metals, ideally including thallium, not just the standard four[1][2][3]. A brand that won’t show you a current COA on request is a real red flag given how documented this contamination risk is.
Frequently Asked Questions
Is shilajit safe to take?
It can be, but safety depends heavily on sourcing and purification quality. Raw or poorly-processed shilajit can contain genuinely harmful levels of heavy metals, so only products with third-party heavy-metal testing should be considered[1][3].
Can purified shilajit still contain heavy metals?
Yes, this is one of the more surprising findings, a 2025 study found some processed, store-bought shilajit had higher thallium levels than raw shilajit[3].
Why does shilajit taste and work differently between brands?
Because it’s a naturally occurring substance, its composition varies by source location and processing method, unlike a synthesized supplement with a fixed formula[1].
How do I know if a shilajit product is actually safe?
Look for a current, independent certificate of analysis (COA) that specifically tests for heavy metals including thallium, not just the standard lead/arsenic/mercury/cadmium panel[3].
References
- Cleveland Clinic. Shilajit Benefits, Side Effects and Uses. health.clevelandclinic.org/shilajit-benefits…
- Banner Health. The Risks, Benefits and Safe Use of Shilajit. www.bannerhealth.com/healthcareblog/advise-me…
- Kashmiril. Heavy Metals in Shilajit: What Most Brands Hope You Never Test. kashmiril.com/blogs/journal/heavy-metals-in-s…
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.
