Shilajit has better human clinical evidence than most traditional supplements, but with one condition attached to nearly every positive result: the trials used purified shilajit. A 2016 randomised, placebo-controlled study in Andrologia found 250 mg twice daily for 90 days raised total testosterone by about 28% and free testosterone by about 20% in healthy men, and a 2019 trial found 500 mg daily reduced fatigue-related strength loss.
Shilajit is a mineral-rich resin from Himalayan and other high-altitude rock, whose main active fractions are fulvic acid and dibenzo-alpha-pyrones. Two placebo-controlled human trials support modest effects on testosterone and on fatigue-related muscle performance, both using purified material at 250–500 mg per day. Raw, unpurified shilajit is a genuinely different proposition — it can carry heavy metals, mycotoxins, and soil contaminants, which is why purification is a safety requirement rather than a marketing term.
Shilajit is easy to dismiss as another exotic resin with big claims and thin data. That would be a mistake. It's one of the few traditional preparations with randomised placebo-controlled trials behind its two headline uses. The catch is that the material sold under the name varies enormously, and the difference between the version studied and the version on sale is the whole story.
What Is Shilajit?
Shilajit is a blackish-brown resinous exudate that seeps from rock layers in high mountain ranges, primarily the Himalayas, Altai, and Caucasus. It forms over centuries from compressed plant matter altered by microbial action and geological pressure.
It isn't a plant, a mushroom, or a mineral in the ordinary sense. It's closer to a humic substance — the same broad family as the organic fraction of rich soil — concentrated and aged in rock. That origin explains both its mineral content and its contamination risk.
Traditional Ayurvedic use classifies it as a rasayana, a rejuvenating preparation, typically for vitality and stamina. Modern research has largely followed those traditional indications rather than departing from them.
What Does Fulvic Acid Actually Do?
Fulvic acid is the principal active fraction, usually the compound a shilajit product is standardised against. Alongside it sit dibenzo-alpha-pyrones (DBPs, sometimes called urolithins), free and conjugated, plus more than forty trace minerals.
The proposed mechanism centres on mitochondrial function. Fulvic acid and DBPs appear to support ATP availability — the cell's usable energy currency — which would explain why the measurable effects cluster around fatigue, endurance, and hormonal output rather than any single organ system.
Percentage matters when comparing products. A resin standardised to a stated fulvic acid content is comparable across batches; one sold only as "pure Himalayan shilajit" is not.
The Testosterone Evidence
This is shilajit's strongest single result. In a randomised, double-blind, placebo-controlled trial, healthy male volunteers took 250 mg of purified shilajit twice daily for 90 consecutive days. Total testosterone rose roughly 28%, free testosterone roughly 20%, and DHEAS also increased significantly compared with placebo (Pandit et al., Andrologia, 2016).
Two honest qualifications. The participants were healthy men aged 45–55, so the result doesn't automatically transfer to younger men, to women, or to anyone with a diagnosed hormonal condition. And 90 days is a long runway — this is not a supplement that shows its hand in a fortnight.
If male vitality is the goal, shilajit is worth considering alongside the mushroom options covered in our guide to the best mushrooms for men, which work through different mechanisms entirely.
The Fatigue and Performance Evidence
A 2019 trial tested 500 mg per day of purified shilajit extract over eight weeks and found it reduced the fatigue-induced decline in maximal voluntary isometric contraction, alongside lower serum hydroxyproline — a marker associated with connective tissue breakdown (Keller et al., J Int Soc Sports Nutr, 2019).
The practical reading is narrow but real: shilajit appeared to help maintain strength under fatigue rather than to increase peak strength. That's a recovery-and-resilience effect, not a pre-workout stimulant effect.
For people stacking supplements around training, this places shilajit closer to cordyceps in function than to a caffeine-type product — see our cordyceps dosage guide for a comparison point on the endurance side.
Why "Purified" Is a Safety Requirement, Not a Marketing Word
Raw shilajit scraped from rock is not a finished product. Because it forms in mineral-rich geology, it can carry lead, arsenic, mercury, and cadmium, along with soil, sand, moulds, mycotoxins, and microbes.
Proper processing — filtration, controlled drying, and testing — removes contaminants while retaining the fulvic acid and DBP fractions. Unprocessed material is not the more authentic option; it's the unfinished one.
Practically, look for a stated fulvic acid percentage, third-party heavy metal testing, and a clear description of processing. Absent all three, you're buying geology of unknown provenance. The same reading discipline from our supplement label guide applies.
Resin or Capsules?
Both formats deliver the same purified material; they differ in convenience and dosing precision.
Resin is the traditional form — a sticky, tar-like mass dissolved in warm water or milk. A pea-sized portion is the usual serving. It's harder to dose exactly and has a strong, bitter, mineral taste that not everyone tolerates.
Capsules deliver a measured amount with no taste, which matters if you're trying to match the 250–500 mg ranges used in the research. Our shilajit resin and shilajit capsules cover both preferences.
Who Should Avoid Shilajit
- Pregnant or breastfeeding — no safety data.
- People with haemochromatosis or iron overload — shilajit contributes iron.
- Anyone with gout or elevated uric acid — it may raise uric acid levels.
- People on blood pressure or hormone medication — check with a doctor first.
- Anyone offered raw, untested material — regardless of price or origin story.
What the Evidence Doesn't Support
Shilajit marketing runs well ahead of its research, and naming the gap is more useful than another summary of the positive findings. The trials that exist are small, mostly single-centre, several are industry-funded, and few have been independently replicated. That's a thin foundation for the range of claims attached to it.
Specifically, there's no good human evidence that shilajit reverses ageing, detoxifies anything, treats altitude sickness, improves fertility outcomes, raises immunity in any measurable way, or acts as a mineral supplement worth counting toward daily intake. The trace mineral claim in particular deserves scepticism: the amounts present are small, variable between sources, and not standardised, so treating shilajit as a mineral source rather than a plant-derived compound with a few studied effects gets the pharmacology backwards.
The fulvic acid framing carries its own overreach. Fulvic acid is a family of compounds rather than a single defined molecule, its content varies substantially between shilajit sources, and most of the mechanistic claims made for it come from laboratory and agricultural research rather than human trials.
Bottom Line
Shilajit has a small but real body of human evidence behind a narrow set of outcomes, and a much larger body of marketing behind everything else. Purification isn't optional — unprocessed material carries genuine heavy metal and mycotoxin risk — so a published certificate of analysis is the first thing to look for and the only claim on the packaging that can be verified.
Treat it as a supplement with a few interesting preliminary findings, not as the panacea its history and pricing suggest. Anyone taking prescription medication, managing a health condition, or pregnant should talk to a clinician before starting.
This article is for informational purposes only. It is not intended to diagnose, treat, cure or prevent any disease. Consult a qualified healthcare professional before starting any supplement, particularly if you take prescription medication or have a diagnosed medical condition.
Frequently Asked Questions
How long does shilajit take to work?
Longer than most people expect. The testosterone trial ran 90 days at 250 mg twice daily before measuring its result, and the fatigue trial ran eight weeks at 500 mg daily. Judging shilajit after a week or two doesn't match how it's been studied.
Does shilajit really raise testosterone?
In one randomised placebo-controlled trial, yes — purified shilajit raised total testosterone about 28% and free testosterone about 20% over 90 days in healthy men aged 45–55 (Pandit et al., 2016). That's a single well-designed study in a specific population, not a settled body of literature.
Is raw shilajit better than purified?
No. Raw shilajit can contain heavy metals, mycotoxins, and soil contaminants, and every clinical trial showing benefit used purified material. Purification removes contaminants while retaining fulvic acid and dibenzo-alpha-pyrones.
What's a typical shilajit dose?
Research has used 250 mg twice daily for testosterone outcomes and 500 mg daily for fatigue outcomes. In resin form, a pea-sized amount dissolved in warm liquid is the traditional serving, though capsules make matching a studied dose considerably easier.
Can you take shilajit every day?
The clinical trials dosed daily for 8–13 weeks without significant adverse effects reported in healthy participants. Long-term daily use beyond those windows hasn't been formally studied, so periodic breaks are a reasonable precaution.
Shop Shilajit
Browse our shilajit resin and shilajit capsules, or see the full range at amanitamuscariastore.online. Free shipping on orders over €50.
Related Articles
- Best Mushrooms for Men
- Cordyceps Dosage Guide
- Mushroom Supplement Stacking Guide
- How to Read a Supplement Label
Sources
- Pandit S, Biswas S, Jana U, et al. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia. 2016;48(5):570-575. PMID 26395129
- Keller JL, Housh TJ, Hill EC, et al. The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels. J Int Soc Sports Nutr. 2019;16(1):3. PMC6364418