- What it is made from: humic substances plus plant and microbial metabolites that build up in rock.[1]
- Where it is found: many mountain ranges, with the Himalayas and Hindu Kush most often named in the research literature.[1]
- Why origin matters: local plants, rock and microbes shape composition, including which metals are present.
- What to check: supply-chain documents and batch test results, not altitude or mountain-range claims.
How shilajit forms
Shilajit is an exudate: it oozes from cracks and layers in rock, usually in warm months when the material softens. Researchers describe it as a mix of organic humic substances and metabolites from plants and microbes living in the rock environment.[1] A 2019 review of the literature highlights the role of microbes in producing it, while noting that the formation process is still not fully understood.[2]
The sequence below is the explanation most often given. Treat the timescales quoted in marketing (“formed over centuries”) as unverified: no one has dated commercial deposits in a way that supports specific figures.
- Organic matterPlant material such as mosses and other vegetation collects in rock crevices.
- DecompositionMicrobes break the material down, producing humic substances and other metabolites.
- Mineral uptakeThe organic matter binds elements from the surrounding rock, including unwanted metals.
- ExudationHeat softens the material, which seeps out of the rock as a sticky resin.
- CollectionCollectors scrape it from rock faces. Rock, sand and plant debris come with it.
Simplified model. Different deposits may form in different ways. More detail: how shilajit forms in mountain rock.
Where shilajit is found
Published reviews describe shilajit from many mountain ranges, especially the Himalayas and the Hindu Kush on the Indian subcontinent.[1] UK products also name several other sources. The table shows what each origin claim usually means on a label, and what would actually support it.
| Label claim | What it usually refers to | What would support it |
|---|---|---|
| Himalayan | A range spanning several countries, often Gilgit-Baltistan, Nepal or northern India | A named region and supplier, plus import or purchase records |
| Altai | Mountains where Russia, Kazakhstan, Mongolia and China meet; often sold as “mumijo” | As above |
| Hindu Kush | Afghanistan and northern Pakistan | As above |
| Tibetan / Pamir | Less common on UK listings; claims are harder to trace | As above |
| “High altitude”, “16,000 ft” | A marketing descriptor | Very hard to verify, and altitude says nothing about purity |
A comparison of the two most marketed sources is on Himalayan vs Altai shilajit.
Why origin affects composition
Each deposit forms from local vegetation, local microbes and local rock. That makes chemical variation between sources expected rather than surprising. The variation includes contaminants: a 2025 analysis found thallium in both natural shilajit and finished supplements, at levels that differed between samples and regions.[3]
Two practical consequences follow. First, a study result for shilajit from one source cannot simply be applied to shilajit from another. Second, a “good” origin does not replace testing, because metals in the source rock vary from one rock face to the next. See how geographic origin can affect composition and why composition varies.
Do altitude claims mean anything?
Altitude is one of the most common selling points, and one of the least useful. There is no published evidence that shilajit collected higher up is purer or more effective, and a buyer has no way to confirm where on a mountain a batch was scraped. A product that leads with altitude but offers no batch test results is putting the wrong evidence first. Our article on altitude claims looks at this in detail.
How origin can be checked
There is currently no simple consumer test for where shilajit came from. What can be checked is the paper trail:
- Named region and supplierA specific region and a named collector, cooperative or processor, rather than just a mountain range.
- Batch linkThe origin statement tied to a batch number that also appears on the lab report.
- Consistent storyThe same origin across the label, website and COA, with no changes between batches.
- Willingness to answerThe brand responds to a written question about sourcing. Use our request template.
What “Himalayan” can and can’t tell you is covered on “Himalayan” origin claims, and the documentation brands should hold is on Himalayan shilajit in the UK.
Collection and supply chain
Raw shilajit is usually gathered by hand by local collectors, then sold on to traders and processors before it reaches a brand. Each handover is a point where material from different sources can be mixed and where traceability can be lost. Supply-chain practices and sustainability are covered in how shilajit is harvested, and what happens after collection in extraction and purification.
Common questions
Is Himalayan shilajit better than Altai shilajit?
No published comparison shows one origin is better. Each source varies, so the batch’s test results matter more than the mountain range. See Himalayan vs Altai.
Can a lab test prove where shilajit came from?
Not with the standard tests on a consumer COA. Element profiles can differ between sources, but there is no established reference method a buyer can use to confirm origin.
Why is it called “mountain tar”?
Because of how it looks and where it is found: a dark, sticky material seeping from rock. It is not tar in the petroleum sense. See names for shilajit.
Sources & further reading
Primary research, regulators and standards bodies are cited first. A source being listed here does not mean it supports every claim made by sellers; it supports the specific statement it is attached to.
- Agarwal SP, et al.. Shilajit: a review. Phytotherapy Research 21(5):401–405, 2007. doi:10.1002/ptr.2100; PMID 17295385. View source (opens in a new tab) [Review]
- Shilajit (Mumie): current status of biochemical, therapeutic and clinical advances. Current Nutrition & Food Science 15(2), 2019. doi:10.2174/1573401313666170823160217. View source (opens in a new tab) [Review]
- Quantifying of thallium in Shilajit and its supplements to unveil the potential risk of consumption of this popular traditional medicine. BMC Chemistry 19:20, 2025. doi:10.1186/s13065-025-01384-7. View source (opens in a new tab) [Laboratory analysis]