Shilajit and Erectile Dysfunction: What the Research Actually Shows

No published, placebo-controlled clinical trial has tested shilajit by itself against erectile dysfunction as an outcome. That's the honest starting point, and it's worth stating plainly before anything else, because "shilajit is a natural viagra" is one of the most repeated claims in supplement marketing — and it isn't something any trial has actually measured. What has been studied is testosterone and sperm parameters, which is a related but genuinely different question from erectile function itself.

What Has Actually Been Studied: Testosterone, Not Erectile Function

The trial behind almost every "shilajit boosts testosterone" claim online is a 2016 randomized, double-blind, placebo-controlled study: healthy men aged 45–55 took purified shilajit (250 mg twice daily) for 90 days and saw statistically significant increases in total and free testosterone versus placebo, with gonadotropic hormones (LH and FSH) remaining stable. The published abstract gives neither the sample size nor the size of the rise (more in our testosterone review). Pandit S et al., Andrologia 2016. This is a real, well-designed trial — see the full breakdown in Shilajit Benefits for Men. But note exactly what it measured: blood testosterone levels in healthy men, not erectile function, sexual satisfaction, or any validated erectile-function score. Erectile function is primarily a vascular and neurological process — nitric-oxide- mediated smooth muscle relaxation that increases blood flow — not a direct readout of circulating testosterone. In men without a diagnosed testosterone deficiency, raising testosterone further doesn't reliably translate into improved erectile function; that relationship is much stronger in men who are clinically hypogonadal to begin with. A testosterone trial and an erectile-function trial are not interchangeable evidence, even though marketing copy routinely treats them as if they were.

The Sperm Count Study — Also Not About Erectile Function

The second frequently-cited trial studied 28 men with low sperm counts (oligospermia) who took processed shilajit (100 mg twice daily) for 90 days, finding significant increases in total sperm count (+61.4%), sperm motility, and normal sperm morphology, alongside reduced oxidative stress markers in semen. Biswas TK et al., Andrologia 2010. This is genuinely relevant if the question is fertility or sperm quality — it is not evidence about erectile function or libido. It's frequently folded into "shilajit for sexual health" claims that don't distinguish between fertility, hormone levels, and erectile performance, which are three separate things with three separate (and in erectile function's case, absent) evidence bases.

The Trial That Gets Miscited as Shilajit Evidence

A 2025 randomized, multicenter, placebo-controlled trial did find a real erectile- function benefit — 92.2% of the treatment group improved on a validated erectile function measure, versus 34.8% on placebo, alongside a 46.5% increase in serum testosterone versus 3.3% on placebo. Ganu GP et al., Cureus 2025. Those are strong numbers, and this trial is the one that ends up behind a lot of "shilajit treats ED" claims online. It shouldn't: the formulation tested was an eight-herb blend — Tribulus terrestris, Withania somnifera (ashwagandha), Asparagus racemosus, Mucuna pruriens, Asparagus adscendens, Pueraria tuberosa, Myristica fragrans, and Anacyclus pyrethrum — and contains no shilajit at all. It's a real, positive trial for a real product, but it is not shilajit evidence, and citing it as such is a factual error that happens to show up across a lot of shilajit marketing copy. This is the same combination-product attribution problem covered in Shilajit with Ashwagandha: Synergy, Evidence, and What to Watch For, just in the opposite direction — a trial with no shilajit in it, attributed to shilajit anyway.

What About "Shilajit Makes You Bigger"?

This specific claim has no research behind it at all — not animal data, not a proposed mechanism, nothing. It doesn't appear in any of the human trials above, none of which measured anatomical size as an outcome, and there's no plausible biological pathway connecting shilajit's known compounds (fulvic acid, trace minerals, DBPs) to permanent tissue size change. This is a meaningfully different category of claim from the testosterone research above: testosterone has real, if narrow, trial support with honest caveats; this one doesn't have a starting point to caveat.

So Is "Natural Viagra" a Fair Comparison?

No trial has ever tested shilajit head-to-head against a PDE5 inhibitor (sildenafil, tadalafil, or similar), and no trial has tested shilajit against placebo using a validated erectile-function scale at all. "Natural viagra" isn't a conclusion drawn from a study — it's a marketing framing borrowed from the testosterone trial and applied to a different physiological endpoint the trial never measured. If the actual goal is treating diagnosed erectile dysfunction, that's a conversation for a physician and an evidence base (like PDE5 inhibitors) that has been directly studied for exactly that purpose — not an extrapolation from a hormone panel.

Quick Answers

Does shilajit help with erectile dysfunction? No trial has tested this directly. Shilajit has trial support for raising testosterone in healthy men and improving sperm parameters in men with low sperm counts — neither is the same as a study of erectile function.

Is shilajit a natural viagra? That framing isn't supported by any trial. No study has compared shilajit to a PDE5 inhibitor or to placebo using a validated erectile-function measure.

Does shilajit increase libido? Indirectly, possibly, through the testosterone effect shown in healthy men — but no trial has measured libido or sexual satisfaction as a direct outcome.

Does shilajit increase penile size? No. There is no research, mechanism, or plausible biological basis for this claim.