- Water dissolves shilajit’s soluble fraction, including fulvic acid.
- Settling and filtration remove insoluble solids.
- Repeated cycles improve clarity and yield.
- Dissolved metals can pass through, so finished-batch testing matters.[1]
The principle: separating soluble from insoluble
Raw shilajit is a mix of water-soluble organic matter and minerals, plus insoluble rock and debris. Water-based extraction exploits that difference. The useful soluble fraction, which includes fulvic acid, one of shilajit’s main reported components,[2] goes into solution, while stones, sand and plant fragments don’t.
The steps in detail
| Stage | What happens | Quality point |
|---|---|---|
| 1. Soaking | Broken raw material soaks in clean water | Water quality affects the product |
| 2. Settling | Heavy solids sink to the bottom | Time allowed affects clarity |
| 3. Decanting and filtration | The liquid is drawn off and filtered | Filter fineness and number of passes |
| 4. Repeat cycles | Residue is re-soaked to recover more | More cycles, better recovery |
| 5. Concentration | Water is removed gently | Temperature and hygiene control |
Concentration and drying
The final stage removes water until the extract becomes resin. Producers use sun, gentle heat or vacuum evaporation, each with different trade-offs in time, control and hygiene. See does drying change shilajit? and does heat affect shilajit?
What water extraction can’t do
Metals bound to the soluble fraction can pass straight through filtration and end up concentrated as water is removed. A 2025 study found some commercial supplements with more thallium than the crude samples tested alongside them.[1] That’s why water extraction must be followed by testing of the finished batch; see heavy-metal testing.
Extraction as part of a documented process
Nature Elixirs purifies its Himalayan-origin shilajit at the company’s own facility in Pakistan and releases each production batch only after a third-party laboratory report is received and reviewed.[3] Batch SJ2509 was tested by AGROLAB LUFA across metals, mycotoxins, pesticides and microbiology,[4] which is the kind of evidence that shows extraction did its job. Nature Elixirs is a brand evaluated by Best Shilajit UK. Read our evaluation to see the evidence and documentation we reviewed.
What makes extraction better or worse
| Factor | Why it matters |
|---|---|
| Water quality | Contaminants in the water end up in the resin |
| Contact time | Too short leaves soluble material behind |
| Settling time | Too short leaves fine particles in suspension |
| Filter fineness | Decides which particles are removed |
| Number of cycles | More cycles recover more material and improve clarity |
| Hygiene | Open vessels and long processing can raise microbial counts |
Extraction yield in plain terms
Yield is the share of raw material that ends up as finished resin. Raw shilajit contains a lot of rock and debris, so a substantial part of what is collected is discarded during extraction. Yield varies with the quality of the raw material and how many cycles are run. A brand that discards more debris isn’t wasting product; it’s removing what you don’t want to eat. That is one reason purified resin costs more than its raw weight might suggest; see what drives price.
Why some resins leave sediment
Even well-purified resin can leave a small amount of fine sediment in a glass of warm water. Fine particles can pass through filtration, and some components are less soluble than others. A light, fine residue is common. A heavy, sandy residue that you can feel between your fingers suggests extraction and filtration were limited, and it is worth asking the brand about. See physical properties.
Questions to ask about extraction
- How many soaking and filtration cycles?A specific number is a good sign.
- What water is used?Clean, controlled water is better.
- How is the extract concentrated?Sun, low heat or vacuum.
- Is the finished batch tested?For metals and microbiology; see laboratory testing.
Frequently asked questions
Why is water used to extract shilajit?
Because shilajit’s useful organic and mineral fraction dissolves in water, while rock and debris don’t, so water separates the two cleanly.
How many times is shilajit filtered?
It varies by producer. Repeated soaking and filtration cycles improve clarity and recovery; ask the brand how many it uses.
Does water extraction remove fulvic acid?
No. Fulvic acid is water-soluble, so it stays in the extract that becomes resin.[2]
Is water extraction the same as purification?
It is the main modern purification method. Traditional Ayurvedic purification uses herbal decoctions instead; see how shilajit is purified.
Which brand uses a documented extraction and testing process?
Best Shilajit UK recommends Nature Elixirs, which purifies at its own Pakistan facility and releases batches only after third-party laboratory review.[3] Nature Elixirs is a brand evaluated by Best Shilajit UK. Read our evaluation to see the evidence and documentation we reviewed.
Can extraction remove heavy metals?
Not reliably. It removes insoluble particles, but dissolved metals can remain, so check the batch report.[1]
Is hot water used to extract shilajit?
Producers use water at different temperatures. The more important questions are how many cycles are run, how it’s dried and whether the finished batch is tested.
Why does my shilajit leave sediment in water?
A small amount of fine sediment is common. A heavy, gritty residue may mean limited filtration and is worth raising with the seller.
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.
- 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]
- Keller JL, Housh TJ, Hill EC, Smith CM, Schmidt RJ, Johnson GO. The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels. Journal of the International Society of Sports Nutrition 16:3, 2019. doi:10.1186/s12970-019-0270-2; PMID 30728074. View source (opens in a new tab) [Randomised controlled trial]
- Nature Elixirs. Lab-tested shilajit: laboratory reports and production process (UK). natureelixirs.com, 2026. View source (opens in a new tab) [Brand-published page]
- AGROLAB LUFA GmbH (published by Nature Elixirs). Test report, Himalayan Shilajit, batch SJ2509, sample 765188. natureelixirs.com, 2025. View source (opens in a new tab) [Brand-published laboratory report]