Is Shilajit Safe? Heavy Metals, COA Testing, and FDA Status
Last reviewed September 2026 · 11 min read
The short answer
Purified shilajit has a good safety record in the clinical trials that have been run, which have reported no serious adverse events at 250–500 mg per day over 8 to 14 weeks. The realistic risk is not the substance — it is contamination. Shilajit forms in direct contact with rock, so it concentrates whatever is in that rock, including lead, arsenic, mercury and cadmium. Purification is supposed to remove them, and there is no way to know whether it did except a laboratory test on the finished product. Nobody checks this for you before sale: the FDA does not approve supplements, and has set no heavy metal limit for them. So the question "is shilajit safe" has no general answer. The answerable question is whether this jar has been tested, by whom, and what the numbers were.
The risk is contamination, not the compound
Shilajit is a mineral pitch that seeps from rock faces in the Himalayas, the Altai range and about twenty other regions. It is not grown or synthesised; it is collected from the surface of stone. A 2024 review in Biological Trace Element Research counted around 65 metals reported in shilajit samples across the literature, toxic ones included. Most reported measurements sat under the permissible limits used for herbal products — but not all of them did, and the review's own conclusion was blunt: consuming shilajit without knowing where it sits against those limits is not safe.
That is the entire safety problem in one sentence. Two jars of shilajit can look identical, smell identical, dissolve identically, and differ by an order of magnitude in lead content, because they came off different rock and were purified to different standards. Appearance tests circulating online — the resin softening in your hand, or dissolving cleanly in warm water — distinguish shilajit from obvious fakes. They tell you nothing at all about metals. Only a laboratory can measure those, which is why the home tests for fake shilajit are a starting point rather than a verdict.
The four metals that matter are lead, inorganic arsenic, mercury and cadmium. They are the four with the best-established toxicology at low chronic doses, and the four that every credible supplement heavy metals panel reports. Our heavy metals guide covers what each one does and the limits each standard sets.
What the FDA does and does not do
Dietary supplements in the United States are governed by the Dietary Supplement Health and Education Act of 1994 (DSHEA). Under it, supplements are regulated much more like food than like medicine, and the practical consequences are worth stating plainly.
| The FDA does | The FDA does not |
|---|---|
| Require manufacturers to follow current good manufacturing practice rules (21 CFR Part 111) — written specifications for identity, purity and composition, and records proving each batch met them | Approve, review or test a supplement before it goes on sale |
| Inspect registered facilities, including overseas ones shipping to the US | Set a maximum permitted level for lead, arsenic, mercury or cadmium in dietary supplements |
| Act after the fact — warning letters, import alerts, recalls, seizures | Verify that a "third-party tested" or "purified" claim on a label is true |
| Require the disclaimer that a structure/function claim has not been evaluated by the FDA, and require serious adverse events to be reported | Assess whether the product works, or whether its dose matches the one used in research |
21 CFR Part 111 does require a manufacturer to set and meet purity specifications — but the manufacturer writes those specifications. A firm that never specifies a lead limit has not broken the rule by failing to meet one.
None of this makes supplements unregulated, and it is not an argument that shilajit is dangerous. It does mean the burden of proof sits with the buyer, and that the only document capable of discharging it is a laboratory report. That is why this database grades what a Certificate of Analysis documents rather than what a label claims — see our methodology.
What a COA proves — and what it doesn't
A Certificate of Analysis is a laboratory's report on a specific sample. It is the strongest evidence available in this market and it is still narrower than most buyers assume. Five questions decide how much a given COA is worth.
- Who issued it? An independent ISO 17025-accredited laboratory naming itself on the report is the strongest case. A document on the brand's own letterhead, or a manufacturer's certificate that names no laboratory, is a self-assessment — we grade those lower, and in our own audits that distinction has moved products several grades.
- What was tested? A report on the incoming raw material is not a report on the jar you bought. Extraction, drying, encapsulation and blending all happen after that sample was taken. Look for the finished product.
- Which batch? A COA with no batch or lot code cannot be tied to any particular production run, including yours.
- Numbers or a verdict? "Pass" or "Complies" means the lab compared the result to a limit somebody chose and did not tell you what it measured. Numeric results in ppm or mg/kg can be checked against any standard you like. This difference matters enough that we wrote a separate guide to it.
- How old is it? Raw material changes between harvests and suppliers. A report from four years ago describes material nobody is selling now.
What a COA never proves: that the product works, that the dose is meaningful, that the source region is what the label says, or that every batch is clean. It is evidence about one sample, tested once. That is still far more than an untested product offers.
How to read a heavy metals panel in three steps
Heavy metals limits are set as a daily exposure — micrograms per day — while COAs report a concentration, usually ppm (equivalently mg/kg, or µg per gram). They are not the same unit, and comparing them directly is the most common mistake made with these documents. Converting takes one multiplication.
The conversion
ppm on the COA × grams you take per day = micrograms per day.
A resin COA reports lead at 0.4 ppm. You take a 0.5 g dose. 0.4 × 0.5 = 0.2 µg of lead per day — inside both the 5 µg/day that USP general chapter <2232> permits for dietary supplements and California's much stricter 0.5 µg/day Proposition 65 warning threshold. Take 1.5 g of the same resin daily and it becomes 0.6 µg/day: past the Prop 65 threshold, still far inside the USP limit. The concentration never changed — your exposure tripled.
- Find the four metals. Lead, arsenic, mercury, cadmium. If any of the four is missing from the panel, the panel is incomplete — that is a finding in itself.
- Convert at your real dose. Multiply each ppm figure by the grams you actually take daily, not by the serving on the label if you take more. Results reported as "< 0.01" mean the lab could not detect the metal above its detection limit, which is the best outcome available.
- Compare against a standard, not a vibe. USP <2232> permits, per day: 5 µg lead, 10 µg inorganic arsenic, 15 µg total mercury, 5 µg cadmium. California Prop 65 is stricter and is the tightest number in common use. Neither is legally binding on a supplement sold outside California — they are the yardsticks a responsible manufacturer chooses to meet.
Two footnotes worth knowing. Arsenic limits apply to the inorganic form, which is the toxic one; a COA reporting only "total arsenic" is being conservative, not lenient. And if you are buying for someone pregnant or for a child, stop using these numbers: the FDA and WHO both hold that there is no safe level of lead exposure in childhood, and "below the adult limit" is not the standard you want.
"Third-party tested" versus actually tested
The phrase is unregulated, and in this market it is used to mean at least four different things. Ranked from strongest to weakest:
- Verified: a public COA, from a named independent laboratory, numeric results, finished product, batch code, dated within two years. This is what earns the top grades here — and across the products in our database, only a minority clear it.
- Partly verifiable: a public COA that fails one of those tests — no batch code, raw-material scope, or several years old. Real evidence, narrower than it looks.
- Claimed: the label or website says third-party tested, and no document is published. Nothing to check. We record this as a claim, not as testing.
- Misleading: a certificate on the brand's own letterhead described as independent; a lab logo with no report behind it; results given only as "Complies". We have found all three while auditing COAs against the documents themselves.
There is one more failure mode that does not fit the ladder: a COA that exists but is effectively unfindable — buried in an accordion, behind a contact form, or shown as an unlabelled gallery image. We treat discoverability as part of transparency for that reason. A test result nobody can locate does not help a buyer.
Side effects, interactions, and who should not take it
Set contamination aside and the reported side effect profile of purified shilajit is mild — the human trials to date have reported good tolerability, with unchanged liver and kidney markers in the studies that measured them (we go through each of those trials here). Reported complaints are mostly gastrointestinal and mostly at higher doses. But "few reported effects" partly reflects how few and how small the trials are, and there are specific cautions worth naming.
- Pregnancy and breastfeeding: avoid. Beyond the lead argument, there is a published case of a pregnant woman who developed persistent hypertension and low potassium after six months of taking mumijo (a regional name for shilajit), diagnosed as a licorice-like mineralocorticoid excess syndrome that resolved when she stopped. One case report is not a frequency — it is a reason not to experiment during pregnancy.
- Children: no trial has studied it in children, and the lead argument is strongest here.
- Kidney disease: impaired clearance changes the calculation on any accumulating metal. We go through the evidence, including what is and is not known about shilajit's own compounds, in Is Shilajit Safe for Your Kidneys?
- Iron overload conditions: shilajit contains iron and has been studied for improving iron status. If you have haemochromatosis or are being treated for iron overload, that is a reason to ask a doctor first.
- Gout or high uric acid: shilajit contains purine-related compounds and is traditionally flagged as a caution in these cases. The evidence here is weak in both directions; raise it with a clinician rather than guessing.
This is general information, not medical advice. If you take prescription medication or have a chronic condition, ask a doctor or pharmacist before adding shilajit — the interaction data simply does not exist to answer it from the literature.
For the side effect question on its own — what each trial measured, what the one published adverse case involved, and why most reported gummy side effects trace to something other than the shilajit — see Shilajit Side Effects: What's Documented and What Isn't.
A checklist before you buy
What a safe purchase looks like
- A COA you can open from the product page without contacting anyone
- An independent laboratory named on the report itself, not just on the website
- Lead, arsenic, mercury and cadmium reported as numbers, not as "Pass"
- Results measured on the finished product, not the incoming raw material
- A batch or lot code on the report
- A report date within the last 24 months
- A microbial panel as well as metals
- A stated country of manufacture, and the dose in mg per serving
Every one of those is a line item in our grading, and each product page shows which ones a product cleared and which it missed. The buyer's checklist walks through the same criteria with examples of what good and bad look like on a real document.
See which products actually clear the bar
The products below have a public COA from a named independent laboratory with numeric heavy metal results measured on the finished product.
Frequently Asked Questions
Is shilajit safe to take every day?
The clinical trials that exist dosed shilajit daily for 8 to 14 weeks at 250–500 mg per day and reported no serious adverse events, with liver and kidney markers unchanged where they were measured. Daily use of a product with a clean, current COA is consistent with how it has been studied. Daily use is also what makes contamination matter: a metal you take once is a rounding error, and one you take every day for a year accumulates. Nobody has studied multi-year continuous use.
Does shilajit contain heavy metals?
Some does. It forms in contact with rock and takes on that rock's mineral profile, so trace amounts of lead, arsenic, mercury and cadmium are expected even in good material. Purification is meant to bring them to levels that are trivial at a normal dose, and the products in our database with public lab reports mostly show exactly that — several report all four metals below the laboratory's detection limit. The problem is the products with no report, where the honest answer is that nobody knows.
Is shilajit FDA approved?
No, and no dietary supplement is. Under DSHEA the FDA does not approve supplements before sale; manufacturers are responsible for their own safety substantiation, and the FDA acts afterwards if a product proves harmful or is misbranded. A brand claiming to be "FDA approved" is describing something that does not exist for this category. "Manufactured in an FDA-registered facility" is a different and much weaker statement — registration is a notification, not an inspection result.
How much lead is too much in shilajit?
USP general chapter <2232> sets 5 micrograms per day as the limit for lead in a dietary supplement, and California's Proposition 65 sets 0.5 micrograms per day as the threshold for a warning label. Convert the COA to compare: multiply the ppm figure by the grams you take daily. At a typical 0.5 g resin dose, a product reporting 1 ppm of lead delivers 0.5 µg per day. Neither limit is enforced against supplements by the FDA, which has set none of its own.
What are the side effects of shilajit?
In published trials, reported effects were mild and mostly digestive, and tolerability was generally good over 8 to 14 weeks. The serious risks documented in the literature come from contaminated or unpurified material rather than from shilajit itself, with one published case of a licorice-like syndrome — hypertension and low potassium — in a pregnant woman taking mumijo. The trial base is small, so absence of reported effects should not be read as proof of absence.
Who should not take shilajit?
People who are pregnant or breastfeeding, children, and anyone with an iron overload condition such as haemochromatosis should avoid it. People with kidney disease, gout or a chronic condition, and anyone on prescription medication, should ask a clinician first — there is essentially no interaction research to consult.