THE SHORT VERSION: One well-designed trial found that purified shilajit supported healthy testosterone levels within the normal range in healthy men aged 45–55. The effect was measured at 90 days of daily use, so this is a long game, not a quick fix. Shilajit isn't a treatment for any medical condition. If you're worried about your levels, see a doctor first.
"Does shilajit affect testosterone?" is the question behind most shilajit searches, and the answers online range from breathless to dismissive. The truth sits in one specific study. This guide walks through exactly what that trial did, what it found, what it doesn't prove, and what a realistic expectation looks like for a healthy man in his 40s or 50s.
Does Shilajit Support Healthy Testosterone Levels?
Yes, within limits. In a 90-day randomized trial, purified shilajit supported healthy testosterone levels within the normal range in healthy men aged 45–55.*[1] It's one trial, so treat it as promising evidence, not the final word.
The study is the reason shilajit shows up in so many men's supplements, and it's a legitimate piece of research: randomized, double-blind, and placebo-controlled.[1] That design means neither the participants nor the researchers knew who got shilajit and who got a placebo, which guards against wishful thinking on both sides. But one study, in one age group, is a starting point. The sections below explain why.
What Did the Shilajit Testosterone Study Do?
Ninety-six healthy men aged 45 to 55 enrolled, and 75 completed the study. They took 250 mg of purified shilajit or a placebo twice a day for 90 days.[1]
Material: a purified, standardized shilajit extract (PrimaVie®) containing at least 50% fulvic acids, the organic compounds that make up most of shilajit's active fraction.[1]
Dose: 250 mg twice daily, 500 mg a day in total.
Length: 90 days, with hormone levels measured against baseline.
Measured: total testosterone, free testosterone, DHEA-S, and the pituitary hormones LH and FSH.
The research was funded by the extract's manufacturer, Natreon.[1] Industry funding is common in supplement research and doesn't invalidate a study, but it's worth knowing.
What Did the Study Find?
Compared with placebo, the shilajit group showed significantly higher total testosterone, free testosterone, and DHEA-S at 90 days.[1] Put simply, it supported healthy testosterone levels within the normal range.*
A quick translation of the markers:
Total testosterone: all the testosterone in your blood, including the portion bound to proteins.
Free testosterone: the unbound portion your tissues can use directly.
DHEA-S: a precursor hormone your body converts into other hormones, including testosterone.
LH: the signal from your brain that tells your body to make testosterone. It held steady in the shilajit group.[1]
The steady LH is a detail worth noticing. It suggests shilajit wasn't overriding the body's normal signaling but working within it. FSH, a related pituitary hormone, also held steady.[1]
What Doesn't the Study Show?
The trial supports a structure/function benefit in healthy men, but it doesn't show shilajit treats any condition, works in every age group, or replaces medical care.
It's one trial. No large independent study has replicated it yet. A U.S. Department of Defense review notes shilajit's human research is limited to a few small studies, some of them industry-funded.[2]
It studied men aged 45–55. We don't have direct data for men in their 20s or 30s.
It studied healthy volunteers. Shilajit is not a treatment for any medical condition.
It used one specific extract. The findings are ingredient-level evidence for purified shilajit, not a guarantee for any single product. We explain why in PrimaVie Shilajit: What "Clinically Studied" Actually Means.
It didn't measure how men felt. The outcomes were blood markers, not energy, drive, or performance.
None of that makes the finding meaningless. It makes it specific. And specific is how you set realistic expectations.
What's a Realistic Expectation?
Slow, steady support over three months, layered on top of the basics. Don't expect overnight change.
The testosterone effect in the study was measured at 90 days of daily use.[1] That lines up with how shilajit works in general: the strength findings in a separate trial also came after weeks of consistent daily use, not a single dose.[3] If you're expecting to feel different by Friday, shilajit isn't that kind of supplement.
It also isn't a substitute for the things that matter most. Sleep, training, nutrition, and managing stress are the foundation of healthy testosterone. A supplement works on top of them, not instead of them. Results may vary.
How Might Shilajit Support Testosterone?
The mechanism isn't settled. The trial measured outcomes, not pathways, so any "here's exactly how it works" explanation goes beyond the data.
What the study does offer are clues. LH and FSH held steady while total testosterone, free testosterone, and DHEA-S rose.[1] Since DHEA-S is a precursor the body can convert into other hormones, one possibility is that shilajit supports the body's own production pathways instead of acting like a hormone itself. Shilajit also delivers fulvic acids, antioxidant dibenzo-α-pyrones, and minerals.[4] Which of these matters most for testosterone hasn't been established. Treat mechanism talk as informed speculation, not fact.
Does the Type of Shilajit Matter for Testosterone Support?
Yes. The research used purified, standardized shilajit at 500 mg a day. Raw or untested material isn't what was studied.
That matters for two reasons. First, effect: shilajit's composition varies widely by source, so an unstandardized product may not deliver what the research material did.[5] Second, safety: raw shilajit can carry heavy metals such as lead and arsenic, and a 2025 analysis found thallium even in some finished supplements.[2][6] If you're taking shilajit daily for three months, purification and third-party testing aren't optional. Our checklist is in Best Shilajit Supplement: 6 Quality Markers That Matter.
Should You Get Your Levels Checked?
If you want to know where you actually stand, yes. Talk to your doctor about bloodwork before and after a few months of consistent use.
The trial tracked blood markers because that's the only way to measure testosterone. How you feel isn't a reliable gauge. A baseline test also flags anything that needs medical attention, which no supplement should mask. And if you're already monitoring your hormones for any reason, tell your doctor you're taking shilajit so they can read your results in context.[7]
Who Is Shilajit for, and Who Should Skip It?
Shilajit fits healthy men, especially 40+, who want to support testosterone within the normal range as part of a consistent routine. Skip it, or check with a doctor first, if any of the following apply.
You think your testosterone may be off. See a doctor and get tested. A supplement is not a diagnosis or a treatment.
You take prescription medication or have a medical condition.[7]
You've been told to limit iron or other minerals. Shilajit is a mineral-dense substance.[4]
You can't verify the product's testing. Raw shilajit can carry heavy metals, so purified, third-party-tested products are the only ones worth taking.[2]
How Do You Take Shilajit for Testosterone Support?
Match the research: 500 mg a day, taken consistently for at least 12 weeks.
Choose a purified, standardized shilajit with a disclosed dose and third-party testing.
Take 500 mg a day with food. The trial split it into 250 mg twice a day; one 500 mg serving delivers the same daily total.[1]
Pick a consistent time, such as breakfast, pre-training, or dinner, and stick with it.
Give it at least 90 days before judging results.
Keep the basics locked in: sleep, training, protein, and stress management.
More on timing and stacking in Shilajit Dosage: How Much Should Men Take Daily?
