What Is Shilajit?
Shilajit is a sticky, tar-like substance found primarily in the rocks of the Himalayas, formed over centuries by the gradual decomposition of certain plants by microorganisms. It contains fulvic acid (60–80% of its composition), over 80 minerals in ionic form, dibenzo-alpha-pyrones, and various amino acids. In Ayurvedic medicine, it's been classified as a "rasayana" — a rejuvenation substance — for millennia.
The modern interest in shilajit for fertility traces back to a handful of clinical studies published in the 2010s. The results are promising, but the research is still limited in scope and sample size. Here's what we actually know versus what the marketing claims.
The Clinical Evidence
Three small-to-moderate studies with consistent positive findings. The mechanism (antioxidant protection via fulvic acid + mineral delivery) is biologically plausible. But we're talking about a total of ~200 study participants across all trials. Compare that to CoQ10 for fertility, which has been studied in over 2,000 participants across dozens of trials. Shilajit is promising but early-stage. The TikTok hype has outrun the evidence — but the evidence that does exist is legitimately encouraging.
How Shilajit May Work for Fertility
The proposed mechanisms, based on both the clinical studies and in vitro research:
- Antioxidant protection: Fulvic acid is a potent antioxidant that may protect sperm membranes from reactive oxygen species (ROS). Oxidative stress is the #1 identified cause of male infertility after varicocele.
- Testosterone support: Shilajit appears to increase testosterone by supporting Leydig cell function and preventing the decline of DHEA-S (a testosterone precursor). It doesn't spike testosterone artificially — it supports its natural production.
- Mineral delivery: The ionic minerals in shilajit (zinc, selenium, iron, copper) are in highly bioavailable form. Zinc and selenium are directly involved in spermatogenesis.
- Mitochondrial function: Dibenzo-alpha-pyrones in shilajit support CoQ10 activity in mitochondria. Since sperm are among the most metabolically active cells in the body, mitochondrial support directly affects motility.
Dosing: What the Studies Used
Both effective studies used 250mg of purified shilajit twice daily (500mg total) for a minimum of 90 days. This is important — the spermatogenesis cycle takes ~74 days, so effects on sperm quality won't appear for at least 2.5–3 months. Don't expect results in 2 weeks.
The key word is "purified." Raw shilajit resin can contain heavy metals, mycotoxins, and contaminants. Studies used standardized, lab-tested extracts — and that's what you should buy.
What to Buy (And What to Avoid)
PrimaVie Purified Shilajit
PrimaVie is the actual trademarked extract used in the 2016 placebo-controlled study. It's standardized to >50% fulvic acid, heavy-metal tested, and available as a raw ingredient from several supplement brands. Look for "PrimaVie" on the label — it's the closest you can get to what was clinically tested.
PrimaVie Shilajit on Amazon →Nootropics Depot Purified Shilajit
Nootropics Depot has a reputation for third-party testing and quality control that exceeds most supplement companies. Their shilajit is standardized to >50% fulvic acid with published CoA (Certificate of Analysis). Available in capsule form for convenience.
Nootropics Depot Shilajit →Jarrow Formulas Shilajit Fulvic Acid Complex
A well-known supplement brand offering PrimaVie shilajit in a 250mg capsule. Jarrow has solid GMP manufacturing and is widely available. Take 2 capsules daily (one morning, one evening) to match the clinical dosing protocol.
Jarrow Shilajit on Amazon →Amazon and wellness sites sell raw shilajit resin in jars for $10–15. Many of these are unprocessed, untested, and may contain dangerous levels of heavy metals (lead, arsenic, mercury). A 2021 analysis of commercial shilajit products found that 40% exceeded safe heavy metal limits. Only buy from brands that publish third-party lab testing or use the PrimaVie trademarked extract.
Should You Take Shilajit?
If you're a male TTC partner and you've already covered the basics — a quality male fertility supplement with zinc, selenium, and CoQ10 — shilajit is a reasonable add-on based on the existing evidence. It's not a substitute for those well-established supplements; it's a complement.
We'd rank it as a "Tier 2" male fertility supplement: behind CoQ10, zinc, and L-carnitine (which have more robust evidence), but ahead of most trending supplements that have zero clinical data behind them.
The Complete Male Fertility Stack
Shilajit works best alongside the foundational supplements for sperm quality. Our male fertility supplement guide covers the full evidence-based protocol.
Male Fertility Supplements →