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Shilajit

Shilajit

Best for

Keep going longer during exercise

Promising early signal 500 mg/day 8 weeks 1 study, n=20

  • 6 papers
  • 1 of 13 outcomes
  • 1 positive

Shilajit shows a promising early signal for longer exercise before fatigue, but human evidence remains limited to a small endurance study.

Median effective dose, most-studied outcomes

  • Sustain more output for longer 500 mg 8 wk
  • Support more typical sperm structure 150 mg/kg 5 wk
  • Support healthy sperm-making tissue 150 mg/kg 5 wk
Full protocol, 3 outcomes

Risk, worst reported severity

  • dizziness mild
  • acne mild
  • aspirin moderate
  • blood glucose lowering moderate
All 11 events and interactions

What shilajit actually does

Outcome Effect Evidence Dose Time Rank
Worth watching 1
Keep going longer during exercise Promising early signal Exercise endurance helps you sustain effort before fatigue makes you slow down or stop.
moderate 		1 RCT 1 papers · n=20 500 mg 8 wk —

Effect tiers come from native-unit MCID where available, Cohen's d otherwise.

Protocol

Dose, timing & forms

How much

For the strongest consumer-facing outcome, the studied protocol used 500 mg twice daily for 8 weeks in active adults, with an early signal for sustaining exercise output.1 That is not enough evidence to claim that higher doses produce bigger benefits. The reproductive findings come from animal research using body-weight-based dosing, so they do not provide a human dose target.

When and how long

The endurance research used daily supplementation across weeks, not an occasional dose taken only before a workout.1 Splitting the daily amount into morning and evening doses matches the human protocol and keeps the routine simple. Since the trial does not establish an immediate pre-exercise effect, do not judge it from a single training session.1

Forms & standardisation

Choose a product that clearly identifies purified shilajit extract rather than an unspecified raw resin. Shilajit varies widely because it is a complex natural mixture, so transparent identity and quality testing matter more here than chasing dramatic marketing claims about one ingredient.2 The limited human exercise evidence applies to the tested purified supplement, not automatically to every resin, powder, or blend.1

Studied range, by outcome

Outcome Studied range Median effective Duration Evidence
Sustain more output for longer 500 mg 500 mg 8 wk 1 paper 2 sig. endpoints
Support more typical sperm structure 100–200 mg/kg 150 mg/kg 5 wk 1 paper 3 sig. endpoints
Support healthy sperm-making tissue 100–200 mg/kg 150 mg/kg 5 wk 1 paper 3 sig. endpoints

Adverse events and drug interactions

Safety events

dizziness mild
acne mild
rash mild
pruritus mild
abdominal pain upper mild
dyspepsia mild
cough mild
pyrexia mild

Drug interactions

aspirin moderate decreases effect
blood glucose lowering moderate increases effect
fluorouracil moderate decreases effect
In context

What this is and how it works

  • One study (n=20) reported positive changes across two fatigue-related endpoints, with no established MCID for noticeable improvement.1
  • Six papers reviewed here spanned 13 outcomes, while only one small human study directly assessed exercise fatigue.
  • Evidence applies narrowly to short-term endurance testing, not broad claims about energy, strength, or general health.

Shilajit is a dark, sticky material that seeps from mountain rock after plant matter changes over a very long time. It contains fulvic acids, minerals, and many other compounds, which makes it less like a single nutrient and more like a chemically busy natural mixture.2

Researchers have not established a single human mechanism for shilajit’s endurance signal. In the exercise trial, investigators tracked strength loss after fatiguing work and a blood marker linked with connective-tissue turnover, like checking both a bike’s power output and wear on its chain after a hard ride.1 That design offers a clue about exercise resilience, but it does not prove why the effect occurred.1

Bottom line

Shilajit is worth watching if you want a modest, experimental endurance supplement and you are willing to use it consistently for weeks. The human evidence is still thin, and the male reproductive findings do not yet translate into a human benefit. Skip casual use if you take medicines that lower blood glucose or have concerns about supplement quality, and discuss it with a clinician first.

Co-studied with

  • Tinosporacordifolia16 shared
Frequently asked

Common questions

Does shilajit improve endurance?

Early evidence suggests it supports sustained exercise output, but that conclusion rests on a small human study rather than a large body of trials. Treat it as an experiment for training support, not a proven performance shortcut.1

How long does shilajit take to work for exercise?

The exercise trial ran for 8 weeks, so the evidence speaks to consistent daily use over weeks, not a one-time pre-workout effect.1

Is shilajit the same as fulvic acid?

No. Shilajit is a complex mineral-rich material that contains fulvic acids alongside many other compounds. Labels that name the extract and its standardization give you a clearer starting point than vague “mineral resin” claims.2

Sources

Sources

  1. 1. Effects of Shilajit Supplementation on Fatigue-Induced Decreases in Muscular Strength and Serum Hydroxyproline Levels (2016) ↑
  2. 2. Shilajit: A Review (2012) ↑

Generated August 27, 2026

Related

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