Shilajit

It can, and this is the most important thing to understand about the category. Shilajit is a mineral concentrate from raw rock, so it concentrates toxic metals (lead, arsenic, mercury, cadmium, thallium) alongside the beneficial fulvic acid and minerals. Raw, unpurified shilajit is genuinely risky, and a 2025 elemental analysis (PMID 39827344) found thallium up to ~0.5 µg/g in commercial supplements — in some cases higher than the raw material they came from, meaning inadequate purification can leave a product dirtier than the rock. The practical takeaway: only buy PURIFIED shilajit from a brand that can show credible third-party heavy-metal testing, and be aware that a vague 'third-party tested' label is not the same as a published lead/arsenic/mercury/thallium panel with numbers. If a brand can't show real testing, don't buy it.

On the current evidence, modestly — and only as a purified product. The anchor trial is Pandit 2016 (PMID 26395129): a randomized, placebo-controlled study in about 75 healthy men aged 45-55 in which purified shilajit at 500 mg/day for 90 days significantly raised total testosterone, free testosterone, and DHEAS versus placebo, with LH and FSH maintained. That's a real, genuine signal — but it's one modestly-sized trial, the effect is moderate (not TRT-like), and it used a purified extract, not raw resin. So a fair expectation is a gradual, modest nudge over about 12 weeks in a product you've verified is purified — not a dramatic transformation. If your testosterone is clinically low, see a doctor; shilajit is a supportive lever, not a treatment for hypogonadism.

It's a trade-off between authenticity and precision, and neither changes the purity rule. Resin is the traditional, full-spectrum form purists prefer — you dissolve a pea-sized portion in warm liquid — but it's bitter, messy, and dosed by eye, with the fulvic content almost never quantified. Capsules are tasteless, effortless, and give you an exact mg; the best of them even disclose a fulvic percentage (rare in this category). Gummies solve the taste problem but deliver a tiny, sub-clinical dose. For most people who want a precise, verifiable dose, a capsule from a transparent, well-tested brand is the easiest right answer; for buyers who specifically want the traditional resin and will vet the source, a credible purified resin works too. Whatever the form, the priority is purification and testing, not resin-versus-capsule.

Because it's the one number that tells you how potent the product actually is — and almost no brand discloses it. Fulvic acid is one of shilajit's two headline actives (with dibenzo-α-pyrones), so a product that states, say, '20% fulvic acid, 200 mg per serving' lets you compare potency instead of trusting an opaque tar blob. In a review of nine leading shilajit products, only one disclosed a fulvic percentage at all. The honest nuance: a higher fulvic percentage isn't automatically 'better,' and disclosing fulvic content is a potency measure, not a purity (heavy-metal) test — the two are different. But a brand willing to quantify its fulvic acid is at least showing you something real, which is more than most do.

Target 500 mg/day of a purified extract — the dose used in both the testosterone trial (Pandit 2016) and the fatigue/strength trial (Keller 2019). More isn't validated to do more, and with shilajit purity matters more than dose size. On timing: any energy/anti-fatigue effect, if you respond, tends to show up within days to a few weeks; the strength endpoint emerged at 8 weeks in Keller 2019; and the testosterone endpoint was measured at 90 days in Pandit 2016. So give it the full 8-12 weeks before judging the hormonal or performance use cases, take it consistently, and set expectations for modest, gradual changes rather than a dramatic shift.

Treat it as premium positioning, not proven benefit. Several premium resins add elemental gold (e.g. 'true gold 555 PPM' or 'Black Gold') or use 'gold grade' as a quality descriptor. The gold infusions are real, specific formulation choices, but there's no human-trial evidence that adding gold to shilajit improves any outcome, and 'gold grade' is a marketing term, not a certified purity standard. So a gold-bearing resin can be a perfectly good product, but you're paying for the formulation and the brand, not for demonstrated extra efficacy — and crucially, a gold infusion is not a substitute for the one thing that actually matters here, which is credible heavy-metal testing.