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Shilajit and Testosterone in Men: One Trial’s 20.45% Rise by Day 90

October 15, 2026
Shilajit and Testosterone in Men: One Trial’s 20.45% Rise by Day 90

The best human evidence we have comes from one small randomized trial, and it showed a 20.45% increase in total testosterone at 90 days in men taking purified shilajit. That is a real, measured signal, not a myth. But one study is not proof of a fix, and product quality varies enough that purity testing matters as much as the dose you take.

TL;DR:

  • The placebo group trial used purified shilajit at 250 mg twice daily; testosterone rose 6.82% at 30 days and 20.45% at 90 days.
  • Only healthy men aged 45 to 55 were studied, no independent team has replicated the results, and effects beyond 90 days remain unknown.
  • A 28 day pilot involving 25 men reported performance gains, but without a control group, it could not separate shilajit from training or diet.
  • Choose purified products with outside lab testing for each batch and a Certificate of Analysis; avoid unclear blends and consult a clinician about medication risks.
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Table of Contents

What Shilajit Is and How Men Typically Take It

Shilajit is a mineral-rich resin that seeps from rock in high mountain ranges, used for generations in Ayurvedic practice. Shilajit contains fulvic acid, but its role in any effects on testosterone remains uncertain. The resin itself is a thick, tar-like substance, and what ends up in a bottle depends heavily on how it was processed.

You will see shilajit sold in a few different forms, and they are not interchangeable:

  • Purified resin: the form used in the clinical trial.
  • Powders: resin dried and ground.
  • Capsules: a convenient form, though product quality can vary.

The randomized trial that produced the 90-day testosterone figures used purified shilajit at 250 mg twice daily. That is the dose and form worth recognizing when you read a label, because a vague "proprietary blend" at an unclear dose is not the same product that was tested.

Human Studies: The 2015 RCT and Recent Clinical Work

The headline evidence is a randomized, double-blind, placebo-controlled trial published in 2015. Researchers gave healthy men aged 45 to 55 either purified shilajit or a placebo, dosed at 250 mg twice daily, and measured total testosterone at 30, 60, and 90 days.

The shilajit group's testosterone rose at every checkpoint compared to baseline: 6.82% at 30 days, 3.09% at 60 days, and 20.45% at 90 days. The effect built slowly and was strongest after three full months of continuous use. Meanwhile, the placebo group's testosterone declined over the same period, which widened the gap between the two groups but also deserves its own scrutiny, covered in the next section.

Reported testosterone changes across three trial checkpoints

A more recent 28-day open-label pilot study adds a second, smaller data point. It tested TruBlk™ shilajit resin at 500 mg per day in 25 healthy men and tracked physical performance and blood biomarkers, including hormonal markers. Researchers reported statistically significant within-group gains in strength, endurance, VO2 max, and lean mass, plus a reduction in body fat, alongside normal safety labs and no serious adverse events.

Here is what separates these two studies and why the distinction matters:

  • The 2015 trial had a placebo arm for comparison, which is the gold standard for isolating a real effect.
  • The 2026 pilot had no control group and no blinding, so its gains cannot be separated from training effort, diet changes, or simple attention to tracking.

The studies examined different outcomes, so they do not establish a consistent effect on testosterone. Neither is large enough to call shilajit a proven testosterone therapy.

How Strong Is the Evidence, and What It Doesn't Prove

One well-designed trial is meaningfully different from a mountain of research. The 2015 study enrolled a narrow group, healthy men aged 45 to 55, which means we cannot say how younger men, older men, or men with existing hormonal conditions would respond. Small sample sizes also make it easier for a handful of high or low responders to swing the average.

A detail worth sitting with: the placebo group's testosterone dropped during the trial. When the comparison group declines while the treatment group rises, the gap between them looks larger than it might if the placebo group had simply stayed flat. That is not evidence the shilajit effect is fake, but it is a reason to read "20.45%" as a relative figure shaped by both arms moving, not just one.

A few other limits are worth naming plainly:

  • No independent research team has reproduced these exact results in a separate trial.
  • There is no long-term data past 90 days, so durability past three months is unknown.
  • Shilajit's chemical makeup varies by source and purification method, which undercuts reproducibility between products and even between batches.

Clinical reviewers at Cleveland Clinic have pointed out that shilajit cannot be recommended as a primary testosterone booster, since the evidence rests on single, small studies without large independent replication, unlike herbs such as fenugreek or ashwagandha that carry more documented research. NIH's Office of Dietary Supplements echoes this from a different angle: any supplement used in research needs verified identity, purity, strength, and stability for the results to mean anything beyond that one batch.

Pro Tip: Treat the 20.45% figure as a promising early signal from one trial, not a guaranteed personal outcome.

Proposed Mechanisms: Fulvic Acid, DHEA, and Steroid Production

The biological story behind shilajit's measured effects is plausible, even if it is not fully proven. Fulvic acid has been proposed as a possible part of shilajit's biological activity, but how shilajit might affect testosterone has not been established.

The 2015 trial also reported a rise in DHEA alongside the testosterone increase. A few points to keep in view:

  • Fulvic acid's antioxidant activity is documented in lab research, not confirmed as the specific cause of the human testosterone changes.
  • Rising DHEA alongside rising testosterone is consistent with a steroidogenesis pathway, but correlation in one trial does not confirm causation.
  • A believable mechanism explains how something might work. It does not replace the need for larger trials to confirm that it reliably does.

Safety, Contamination Risk, and Choosing a Safer Product

Because shilajit comes straight from mineral-rich rock, it carries a real contamination risk that has nothing to do with its testosterone effects. The FDA has issued warnings about heavy metal poisoning tied to unapproved ayurvedic products, and unrefined or poorly processed shilajit is exactly the kind of product that risk applies to.

Before you buy, run through this checklist:

  1. Look for third-party testing. A product tested by an outside lab, not just the manufacturer's own claims, is the baseline for trust.
  2. Ask for a Certificate of Analysis. A legitimate seller can show you exactly what was tested and what was found, down to heavy metal screening.
  3. Check for batch-specific testing. One certificate from years ago covering a different batch tells you nothing about what is in your bottle.

This supplement safety checklist walks through the same verification steps in more depth if you want a broader framework for evaluating any supplement, not just shilajit.

A few red flags are worth walking away from outright: a "proprietary blend" with no milligram breakdown, a complete absence of any batch testing documentation, and marketing claims promising dramatic or guaranteed results that no single small trial could support.

Pro Tip: If a seller can't produce a Certificate of Analysis for the batch you're about to buy, treat that as a dealbreaker, not a minor gap.

If You Try Shilajit: A Measured 90-Day Approach

If you decide to try shilajit, the most evidence-aligned approach mirrors what the trial actually did, not a guess at a stronger dose or a shorter timeline.

  • Use purified shilajit at 250 mg twice daily, the dose and form studied in the 2015 trial.
  • Commit to the full 90-day window before judging results, since the measured gains built slowly and were largest at the final checkpoint.
  • Track how you feel alongside any lab numbers. Energy, mood, and libido are part of the picture, not just a single blood value.

A simple way to structure the trial:

  1. Get a baseline morning total testosterone test before you start.
  2. Begin the 250 mg twice-daily protocol and note any side effects as you go.
  3. Repeat the blood test around the 90-day mark to compare against your own baseline.
  4. Review the results and your symptom notes with a primary care provider.

Stop and talk to a clinician before continuing if you notice new or unusual symptoms, have any history of liver concerns, or take medications that could interact with a mineral-dense supplement. NIH's Office of Dietary Supplements is clear that supplements are not a substitute for professional medical guidance, and that holds especially true when you are also managing other prescriptions.

A Practitioner's Take on Shilajit and Testosterone

Here is where I land on this, plainly: shilajit shows real promise in early research, and I will not pretend otherwise. But one 90-day trial is a start, not a verdict. If you try it, verify the product's purity first, run the honest 90-day test with real baseline numbers, and pair it with the things we know move testosterone reliably: resistance training, consistent sleep, and a body composition in a healthy range. Coordinate with your primary care provider, especially if you are tracking lab values. Treat shilajit as one input among several, not the whole plan.

— Nurse Rachel

An Adjacent Option: Routine-Based Restoration With RedRockit

Supplements are not the only path forward, and for some of us, a routine-driven approach feels like a better fit than adding another pill to track. RedRockit™ Primal Restoration is our at-home red light wellness device, presented as a non-prescription, non-supplement option for men interested in a daily routine.

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  • RedRockit is intended to be part of a consistent at-home routine.
  • We built it as an at-home option that you can use on your own schedule.
  • Pairing a routine like this with the lifestyle work and clinical check-ins covered above is a reasonable way to approach male vitality from more than one angle.

If you want to see how it fits into a broader restoration routine, visit the RedRockit™ Primal Restoration page and decide if it belongs in yours.

FAQ

What are the disadvantages of shilajit?

The main concerns are product quality and evidence strength: unrefined shilajit carries documented heavy metal contamination risk flagged by the FDA, and the testosterone evidence comes from a single small trial rather than large independent studies. Choosing a purified, third-party tested product and setting realistic expectations addresses most of this risk.

What happens if I take shilajit for 30 days?

In the trial that measured this, 30 days of purified shilajit at 250 mg twice daily produced a 6.82% increase in testosterone from baseline, smaller than the later checkpoints. The strongest measured effect in that study appeared at 90 days, not 30, so a month is early to judge results.

How long does it take for shilajit to raise testosterone?

The clinical trial measured changes at 30, 60, and 90 days, with the largest increase, 20.45%, recorded at the 90-day mark. That timeline is the evidence-based benchmark for giving shilajit a fair test.

What happens when a man takes shilajit?

Based on the available research, men taking purified shilajit at the studied dose may see gradual increases in total testosterone and DHEA over three months, alongside the antioxidant and mineral-supportive effects attributed to its fulvic acid content. A separate pilot study also reported improvements in strength, endurance, and body composition over 28 days, though that study lacked a placebo group to confirm the cause.

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