What the evidence covers
| Study | Duration | Safety finding |
|---|---|---|
| Bone density trial[1] | 48 weeks | Reported as well tolerated |
| Testosterone trial[3] | 90 days | Reported as well tolerated |
| Exercise trial[4] | 8 weeks | Reported as well tolerated |
| Rat safety study[2] | 91 days | No significant toxicity at doses tested |
So there is reasonable reassurance for use up to about a year in healthy adults, using a well-characterised extract. Beyond that, and in people with health conditions, the evidence is thin; see why long-term safety data matter.
The cumulative exposure question
Metals such as lead and cadmium accumulate in the body, and cadmium in particular is cleared very slowly. Taking a small amount every day for years adds up in a way that a short trial can’t capture. GB law caps lead, cadmium and mercury in supplements,[5] but a product that sits well below those limits is a better long-term choice than one just under them. That makes the batch report more important for long-term users than for anyone else; see heavy metals and cadmium.
Breaks and cycling
Some people take shilajit in cycles, such as several weeks on and a week or two off. There is no published evidence that cycling improves effects or safety. A practical argument for breaks is that they reduce cumulative contaminant exposure and give you a chance to notice whether shilajit is actually making a difference. If you take breaks, there is no need to “load” with extra when you restart; go back to the label serving.
Set a review point
- Decide why you are taking itWrite down what you hope to notice.
- Review after a few monthsIs it helping? Any side effects?
- Check each new batch’s reportResults can change between batches.
- Mention it at check-upsSo it can be considered alongside blood tests.
Who should be more cautious with long-term use
Older adults, people with kidney or liver conditions, people taking regular medicines and anyone planning a pregnancy have more reason to limit long-term use or seek advice first. People with kidney disease in particular may clear metals less effectively; see older adults and existing conditions.
Each new jar is a new batch
Long-term users buy many jars over time, often from different batches. Contaminant levels can change from batch to batch as raw material changes, so check that each jar’s batch number matches a report, rather than relying on the report you read when you first bought the product; see why the batch matters.
Signs to stop
Stop and seek advice if you notice new symptoms over time, such as persistent stomach problems, tiredness, changes in urination, rash or other unexplained changes. Vague symptoms that build slowly are easy to dismiss, so it helps to note when you started shilajit; see when to stop.
A practical long-term routine
Long-term users benefit from a simple routine: keep each jar’s batch number, check its report before starting the jar, weigh servings consistently, and set a yearly review with yourself, or with your GP if you have health conditions. Pair the review with any routine blood tests you already have, so your GP can interpret results knowing you take shilajit.
Stick to one product at a time
Long-term users sometimes add blends containing shilajit on top of their usual resin, increasing exposure without realising. Check every product you take for shilajit content, and avoid doubling up.
Putting it into practice
If you plan to take shilajit long term, decide on your review date now, keep each jar’s batch number and report together, and stick to the label serving. Tell your GP at your next appointment so it is on your record.
Long-term use and new health issues
If you develop a new health issue while taking shilajit long term, mention it to your doctor even if it seems unrelated. It may not be connected, but your doctor can only consider the possibility if they know.
The bottom line
Daily shilajit appears well tolerated for up to about a year in small studies, but longer-term data are limited, and metal exposure accumulates. Choose a batch-tested product well below the legal limits, stay within the label serving, consider breaks, and review regularly whether it is worth continuing.
Frequently asked questions
Is it safe to take shilajit every day?
Daily use was reported as well tolerated in trials lasting up to 48 weeks.[1] Longer-term data are limited.
Can I take shilajit for years?
There is little data beyond about a year. Cumulative metal exposure is the main concern, so choose a well-tested product and review regularly.
Should I cycle shilajit?
There is no evidence that cycling improves effects. Breaks can reduce cumulative exposure.
Does shilajit build up in the body?
Contaminants such as cadmium and lead can accumulate, which is why batch testing matters.
How long did the longest trial last?
48 weeks, in postmenopausal women.[1]
Do I need to check every new jar?
Yes. Each batch can differ, so match each jar to its report.
Should I tell my GP I take shilajit long term?
Yes, especially before blood tests or new prescriptions.
What signs mean I should stop?
New or persistent symptoms such as stomach problems, tiredness, rash or changes in urination.
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.
- Pingali U, Nutalapati C. Shilajit extract reduces oxidative stress, inflammation, and bone loss to dose-dependently preserve bone mineral density in postmenopausal women with osteopenia: a randomized, double-blind, placebo-controlled trial. Phytomedicine 105:154334, 2022. doi:10.1016/j.phymed.2022.154334; PMID 35933897. View source (opens in a new tab) [Randomised controlled trial]
- Asian Pacific Journal of Tropical Biomedicine authors. Evaluation of safety profile of black shilajit after 91 days repeated administration in rats. Asian Pacific Journal of Tropical Biomedicine, 2012. View source (opens in a new tab) [Animal safety study]
- Pandit S, Biswas S, Jana U, De RK, Mukhopadhyay SC, Biswas TK. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia 48(5):570–575, 2016. PMID 26395129. View source (opens in a new tab) [Randomised controlled trial]
- 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]
- European Commission (UK version on legislation.gov.uk). Commission Regulation (EC) No 629/2008 amending Regulation (EC) No 1881/2006 setting maximum levels for certain contaminants in foodstuffs. legislation.gov.uk, 2008. View source (opens in a new tab) [UK legislation (retained)]