Lead Biohacking Researcher | Cellular Energy & Vitality
Shilajit went from obscure Himalayan folk remedy to the supplement your gym buddy will not stop talking about, partly thanks to a wave of social media ads, some using deepfaked celebrity endorsements. Strip away the hype and there is a real substance here with some genuinely interesting clinical data, and one serious safety problem the ads never mention.
This is the honest breakdown: what shilajit actually does for men according to the studies, what it does not do no matter what the ad claims, and the contamination issue that should decide which product you buy, if any.
Shilajit is a mineral-rich resin whose active compound is fulvic acid. In men, the best evidence shows it supports testosterone, fertility, and cellular energy. A 90-day study found total testosterone rose 20 to 23.5%. The studied dose is 300 to 500 mg daily. The catch: raw shilajit is frequently contaminated with heavy metals, so a third-party Certificate of Analysis is non-negotiable.
What Shilajit Actually Is
Shilajit is a sticky, tar-like resin that seeps from rocks in mountain ranges like the Himalayas, formed over centuries from compressed plant matter. It has been used in Ayurvedic medicine for thousands of years, where it earned the name “destroyer of weakness.”
What matters is the chemistry. Purified shilajit is 60 to 80% humic substances, and its star compound is fulvic acid, roughly 15 to 20% of the material, a powerful antioxidant and a carrier molecule that helps shuttle nutrients into cells. On top of that it delivers 80-plus minerals and trace elements in an ionic, absorbable form. That combination, antioxidant plus mineral delivery, is the engine behind most of its benefits.
The Evidence-Based Benefits of Shilajit for Men
1. It Supports Healthy Testosterone
This is the headline, and it has real backing. In a 90-day clinical trial, healthy male volunteers taking purified shilajit saw total testosterone rise 20 to 23.5%, free testosterone increase 19.14%, and DHEA climb 31.35%, alongside a 9.4% rise in follicle-stimulating hormone. That matters because somewhere between 24 and 39% of adult American men have low testosterone. One important nuance, though, in the honesty section below: this looks more like restoring a stressed system than supercharging a healthy one.
2. It Improves Fertility Markers
The fertility data is some of the strongest in the shilajit literature. In a study of men with low sperm count taking 100 mg twice daily for 90 days, total sperm count rose by an average of 61.4%, and sperm motility improved between 12.4 and 37.6%. Over 60% of the men with fertility problems showed significant improvement, and oxidative stress markers in semen dropped 18.7%.
3. It Boosts Cellular Energy and Endurance
Shilajit works at the mitochondrial level, helping cells produce ATP, the body’s energy currency, which is why it has a long reputation against fatigue. This is the same energy pathway I cover in my guide on how to increase ATP production. The performance data backs it up: a 28-day study found maximal leg-press strength rose 12.94% (from 150.2 to 169.6 kg) and muscular endurance improved 12.30%, with a 41.7% drop in creatine kinase, a marker of muscle damage.
4. It Protects Connective Tissue and Recovery
One of the more striking findings: shilajit appears to upregulate collagen-related genes, by 7 to 80 times at rest and dramatically more when combined with exercise, while reducing a marker of collagen breakdown by 29%. For men over 35 chasing both performance and joint longevity, that recovery angle is underrated.
5. It Supports Brain and Antioxidant Defense
Fulvic acid has been studied for its ability to block the buildup of tau protein, a factor in cognitive decline, which is why shilajit gets framed as neuroprotective. Combined with its broad antioxidant action, it sits in the same “cellular resilience” category as adaptogens. If that framework is new to you, see my guide to what adaptogens are.
The Honest Part: What Shilajit Does NOT Do
Here is where I part ways with the ads. The aggressive marketing makes two claims worth shutting down directly.
First, shilajit does not cause anatomical “growth.” Any ad implying physical enlargement is selling a fantasy with no scientific basis. Second, the testosterone effect is best understood as restoration, not transformation. The trials largely show shilajit helping bodies under stress or with suboptimal levels return toward normal, not turning an already-healthy 25-year-old into a hormonal outlier. If you are looking for steroid-like results from a resin, you will be disappointed. For genuine stress-driven hormonal dips, pairing it with a tool like Rhodiola for fatigue and cortisol often makes more sense than megadosing shilajit.
The Safety Issue Nobody Advertising Shilajit Mentions
This is the most important section in the article. Raw, unpurified shilajit is frequently contaminated with heavy metals, because it is literally scraped off rocks. The numbers are alarming: a 2025 analysis found that 18 out of 18 commercial shilajit samples contained thallium above the safe daily limit of 0.19 micrograms. Lead, arsenic, and mercury are the other common offenders.
This is not a reason to avoid shilajit. It is a reason to be ruthless about sourcing. A legitimate product is purified and proves it with a third-party Certificate of Analysis (COA) showing heavy metals under safe limits: lead at or below 5 ppm, arsenic at or below 5 ppm, mercury at or below 1 ppm. If a seller cannot show you a COA, treat the product as contaminated until proven otherwise.
Skip the Contamination Roulette
The single most important decision with shilajit is buying a purified, lab-tested product. That is exactly why I recommend a verified option rather than a cheap resin of unknown origin.
How to Take Shilajit: Dose, Form, and Cycling
Form matters more than most people realize. Resin is the most potent because it undergoes minimal processing, while spray-dried capsules can lose up to 30% of the bioactive compounds. A quality capsule extract offsets this with concentration, a 50:1 extract means 400 mg delivers the equivalent of 20,000 mg of raw resin.
| Factor | Recommendation |
|---|---|
| Standard dose | 300 to 500 mg daily |
| Starter dose | 200 to 250 mg to assess tolerance |
| Athletic dose | 500 to 1,000 mg (split through the day) |
| Timing | Morning, often on an empty stomach |
| Cycling | 8 to 12 weeks on, then a 4-week break |
| Must-have | Third-party COA for heavy metals |
Start low. Begin at 200 to 250 mg for the first week to gauge tolerance, then move into the 300 to 500 mg range. And cycle it, like most adaptogenic compounds, rather than taking it indefinitely.
Safety, Side Effects, and Who Should Avoid It
Beyond the contamination issue, purified shilajit is generally well tolerated, but it is not for everyone. Because it is iron-rich, people with hemochromatosis (iron overload) should avoid it. Skip it if you have heart disease without medical guidance, and talk to your doctor first if you take blood thinners, blood pressure medication, or diabetes drugs. Chronic high-dose use has been linked in rare cases to a condition called pseudoaldosteronism, another reason to cycle and not megadose. Pregnant and breastfeeding women should not take it.
Frequently Asked Questions
Does shilajit actually raise testosterone?
Clinical evidence suggests yes, modestly: a 90-day study showed total testosterone rising 20 to 23.5% in healthy men. The effect is best understood as restoring levels in stressed or suboptimal systems rather than dramatically boosting already-normal testosterone.
How long does shilajit take to work?
Energy effects can appear within a couple of weeks, but the hormonal and fertility benefits in the studies were measured over 90 days of consistent daily use. Treat it as a multi-week commitment, not an instant boost.
Is shilajit safe to take every day?
Purified, lab-tested shilajit is generally safe for daily use at 300 to 500 mg, but cycle it (roughly 8 to 12 weeks on, 4 weeks off). The real danger is unpurified product: always confirm a third-party Certificate of Analysis for heavy metals.
What is the best form of shilajit, resin or capsules?
Resin is the most potent because it is minimally processed, while spray-dried capsules can lose up to 30% of active compounds. A high-concentration capsule extract (such as 50:1) is a convenient, reliable alternative if it comes with a COA.
Can shilajit help with erectile dysfunction or size?
Shilajit does not increase anatomical size; any claim otherwise is marketing fiction. It may indirectly support sexual health through testosterone and circulation, but it is not a treatment for erectile dysfunction. See a doctor for that.
The Bottom Line
Shilajit is one of the rare trending supplements with real clinical data behind it: meaningful support for testosterone, fertility, and cellular energy in men, especially those whose levels have slipped under stress. But the benefits only matter if the product is clean, and the contamination data shows most are not. Buy purified, demand a Certificate of Analysis, dose at 300 to 500 mg, and cycle it. If you would rather not gamble on sourcing, start with my Shilajit Extreme review for a tested option.