Shilajit: Purity Testing, Who Should Skip It and the Heavy Metal Risk
A tar-black resin sold on roadside stalls near Gilgit and Skardu, priced far below what proper testing would allow, is not automatically shilajit. It might be, partly. It might also carry lead, arsenic or mercury picked up from contaminated rock, none of which announce themselves in taste or smell.
What shilajit actually is
Shilajit is a sticky, mineral-rich resin that seeps from rock in high mountain ranges, formed over centuries from slowly decomposed plant matter compressed under geological pressure. It has a long history in Ayurveda as a rasayana, a traditional rejuvenative substance, and is rich in fulvic acid along with a range of naturally occurring minerals. What is sold commercially varies enormously in purity, processing and, unfortunately, contamination, since raw resin scraped straight from rock is not automatically safe to consume without purification.
Before you start
- How much: the label of a tested, purified product or a qualified practitioner sets it; more is not better.
- Never: raw, unpurified resin scraped directly from rock, sold without lab testing.
- Always ask for: a heavy metal test certificate (lead, arsenic, mercury, cadmium) from the specific batch, not a generic brand claim.
- Who should avoid it: pregnant or breastfeeding women, people with haemochromatosis (iron overload), sickle cell disease, and anyone with kidney disease, without a doctor’s clearance.
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What the research actually shows, honestly
Shilajit has been studied in a modest number of small clinical trials, mostly looking at testosterone levels in men, general fatigue, and altitude adaptation. It has been tried in small trials with mixed results, and the evidence is limited, nowhere near enough to call shilajit proven for any specific outcome. It should be understood as a traditional supplement with early, limited scientific interest, not as a substitute for treating a diagnosed hormonal, energy or fertility problem.
How much: who decides, and why more is not better
The amount is the product label’s call, or a qualified practitioner’s, and it only applies to that product: a purified resin, a capsule and a powder extract aren’t equivalent, so a number from one can’t be carried to another. There is no good evidence that taking more works faster or better, and since shilajit’s mineral content includes elements the body can accumulate over time, staying with what the label says matters more than chasing a stronger effect. If you take BP, diabetes or iron medicines, or have kidney disease, ask your doctor before starting at all.
- Use the amount on the label of a tested product, dissolved fully in warm (not boiling) water or milk.
- Stir until it dissolves completely; a small amount of grit or residue that will not dissolve is a warning sign of poor purification, not a feature.
- Follow the label for how often, and note how you feel over the first week or two.
- Don’t go above the label amount, and stop and see a doctor if you notice stomach pain, a metallic taste, unusual fatigue or dark urine.
- Give any expected effect 8 to 12 weeks before deciding whether it is worth continuing; shilajit is not a fast-acting stimulant and same-day effects should not be expected.
Who genuinely needs to be careful
Pregnant and breastfeeding women should avoid shilajit, since it has not been adequately studied for safety in pregnancy and unpurified resin carries a real heavy metal risk to a developing baby. People with haemochromatosis or any condition involving iron overload should avoid it, since shilajit contains iron and can worsen the condition. People with sickle cell disease or thalassemia should not take it without a doctor’s clearance for the same reason. Anyone with kidney disease should be cautious, since the kidneys process the minerals it contains, and impaired kidneys handle mineral load less well. Shilajit may also interact with iron supplements, diabetes medication, and blood pressure medicine, so tell your doctor if you are on any of these before starting it. Stop immediately and see a doctor if you notice a metallic taste, unusual fatigue, stomach pain or dark urine after starting a new batch, since these can be signs of heavy metal exposure rather than the supplement “working.”
Storing shilajit properly
Genuine resin should be kept in a cool, dry, airtight container, away from direct sunlight and moisture, which can cause it to soften excessively or grow mould over time in humid climates. Properly stored resin typically remains usable for 2 to 3 years, though checking for any unusual smell, colour change, or visible mould before each use is a sensible habit regardless of how long it has been stored.
Myth: darker or more bitter shilajit is purer
Colour and bitterness are not reliable purity markers. Genuine purified shilajit is typically dark brown to blackish and has a distinctly bitter, mineral taste, but so can poorly purified or adulterated resin cut with other tar-like substances, coal extract, or even shoe polish in the worst counterfeit cases reported from unregulated markets. The only reliable way to judge purity is third-party lab testing for heavy metals and a fulvic acid percentage on the label, not appearance, smell, or how a seller describes it.
Reading a label properly
A trustworthy shilajit product typically states the fulvic acid percentage (commonly 15 to 20 percent or higher in a well-processed resin), names the region of origin, and either includes a lab report or a way to request one, usually via a batch number and a QR code or the brand’s website. Vague labelling, no batch information, and prices dramatically lower than comparable tested brands are the three biggest warning signs, more reliable than anything about the resin’s appearance.
In classical Ayurvedic texts, shilajit is described as a rasayana used to support strength, vitality and recovery, and is traditionally paired with other herbs depending on the intended use. Traditional preparation methods involve repeated purification (shodhana) specifically to remove heavy contaminants before use, which is itself an old acknowledgement that raw resin is not meant to be consumed as scraped from the rock. This history is described here as tradition, not as clinical proof of benefit.
Our companion piece, Salajeet (Shilajit): Fakes, Home Purity Checks and Heavy Metals, walks through simple at-home checks for spotting an obviously fake or adulterated batch and covers purity testing in more depth than this article does; read that alongside this one for the buying side of the decision. If you are also weighing another traditional supplement, see Ashwagandha With Milk at Night: Does the Milk Matter. More traditional remedies are covered under Desi Remedies.
Buying and using shilajit safely
How do I know if shilajit is real or fake?
You can’t tell reliably by colour, smell or bitterness, since poorly purified or adulterated resin can look and taste the same. Ask for a heavy metal test certificate for that exact batch, a stated fulvic acid percentage and a named origin. Grit that won’t dissolve in warm water is a warning sign.
Is shilajit safe to take?
Purified, batch-tested shilajit used at the label’s standard amount seems reasonably tolerated in short studies. Raw resin scraped from rock can carry lead, arsenic or mercury that you can’t taste or see. Safety depends mostly on testing, not on the brand’s claims.
Can I take shilajit every day for months?
Most research only covers 8 to 12 weeks, so long-term daily use isn’t well studied. Some people take breaks as a precaution. Because it contains minerals the body can accumulate, sticking to the label amount matters more than taking extra.
Does shilajit increase testosterone?
A few small trials in men reported modest changes in testosterone markers over 8 to 12 weeks, but results aren’t consistent enough to rely on. If you suspect a hormone or fertility problem, get it checked properly instead of self-treating.
Who should not take shilajit?
Pregnant and breastfeeding women, people with iron overload (haemochromatosis), sickle cell disease or thalassaemia, and anyone with kidney disease should avoid it without a doctor’s clearance. Anyone on iron tablets, diabetes medicine or BP medicine should mention it to the doctor before starting.
Can women take shilajit?
Women do use purified, tested shilajit, but it should be avoided during pregnancy and breastfeeding. Anyone with a hormonal condition such as PCOS or thyroid disease should check with a doctor first.
What are the side effects of shilajit?
Some people get stomach upset. Stop and see a doctor if a new batch brings a metallic taste, unusual tiredness, tummy pain or dark urine, as these can point to heavy metal exposure rather than the supplement working.
How long does shilajit take to work?
Don’t expect anything same-day. It isn’t a stimulant, and the studies that reported changes ran for 8 to 12 weeks. If nothing is different after that, it’s reasonable to stop.
Is Gilgit or Skardu shilajit from a roadside stall safe?
Not automatically. Cheap unlabelled resin, with no batch number or lab report, is exactly where contamination risk sits. A price far below tested brands usually means the testing and purification were skipped.
Resin, powder or capsules: which is better?
Resin is the traditional, most concentrated form, while powder and capsules are easier to measure. The format matters less than the purification and heavy metal testing behind that particular product.
Can teenagers take shilajit?
It’s best avoided. There’s almost no research in teenagers, and given the hormone-related interest around it, a growing body shouldn’t be the test case. Tiredness or low energy in a teen deserves a proper check-up instead.