Shilajit Benefits for Men: What Fulvic Acid Actually Does at the Mitochondrial Level

What shilajit is: real vs fake

Shilajit is a blackish-brown resin that seeps from rock fissures in high-altitude mountain ranges, primarily the Himalayas, Altai, Caucasus, and Andes. It forms over centuries from the decomposition of plant matter and microbial activity under compression and extreme temperature variation. The result is a humic substance dense in fulvic and humic acids, dibenzo-alpha-pyrones, and trace minerals.

The relevant active fraction for the mechanisms discussed in the clinical literature is the fulvic acid complex, specifically the dibenzo-alpha-pyrone chromoproteins. This is not a standardized drug with a single active molecule. It is a complex biological material where potency depends entirely on purity and processing.

The fake shilajit problem is significant. Unprocessed or poorly processed shilajit contains heavy metals, fungal spores, free radicals, and other contaminants at levels that exceed safe limits. What you buy in powder form in a foil bag from an unnamed Himalayan source for $15 is not the compound studied in the clinical literature. Purified, standardized extracts -- of which PrimaVie by Natrex is the most studied -- are processed to remove contaminants and standardize the fulvic acid and dibenzo-alpha-pyrone content.

Andrew Huberman addressed this distinction in Episode 84 of Huberman Lab, noting that the quality variance in shilajit products is extreme and that the studies worth citing used standardized purified forms, not raw resin. Primal Forge uses a purified shilajit extract.

The fulvic acid mechanism at the mitochondrial level

Fulvic acid, the primary bioactive fraction of shilajit, is a low-molecular-weight humic acid that can cross biological membranes. This is the property that makes it interesting at the mitochondrial level: most large molecules cannot enter the mitochondrial matrix. Fulvic acid can.

Inside the mitochondrion, fulvic acid appears to act as an electron shuttle, supporting electron transport chain function and enhancing the efficiency of ATP synthesis. The dibenzo-alpha-pyrone component has been proposed to interact with complex I and complex II of the electron transport chain, reducing electron leak and supporting oxidative phosphorylation efficiency [Carrasco-Gallardo C et al., 2012, International Journal of Alzheimer's Disease].

The practical implication: shilajit does not produce more mitochondria (that is the effect you are looking for from endurance training). It may improve the efficiency of existing mitochondria, particularly under conditions of metabolic stress, aging, or nutrient depletion. This is a different mechanism from creatine, which raises the ceiling on rapid ATP replenishment. Shilajit, to the extent the mechanism holds in humans, supports the baseline efficiency of the system that generates ATP over longer timescales.

This makes the compounds complementary rather than redundant. Creatine covers high-intensity output. Shilajit covers mitochondrial baseline. The rationale for stacking them is mechanistically clean.

The CoQ10 bioavailability connection

One of the most repeated claims about shilajit is that it boosts CoQ10 bioavailability. The evidence behind it is thinner than the marketing suggests.

We could not find a published human trial on PubMed showing that shilajit increases CoQ10 absorption. The study often quoted in this context, Surapaneni DK et al. (2012, Journal of Ethnopharmacology), was done in rats: processed shilajit preserved mitochondrial function in a chronic fatigue model, but CoQ10 absorption in humans was not measured. The proposed mechanism is that fulvic acid chelates CoQ10 and facilitates its transport across the intestinal mucosa and mitochondrial membrane, but this remains a hypothesis.

CoQ10 is a critical component of the electron transport chain. Supplemental CoQ10 has well-documented poor bioavailability in standard formulations, which limits its clinical utility despite a reasonable theoretical basis. Whether shilajit improves CoQ10 absorption in humans has not been shown.

The caveat: the supporting data are from animals. It is an interesting hypothesis that needs human trials before it should drive a stacking decision, including if you are already taking CoQ10 Ubiquinone.

The testosterone data: Pandit 2016

This is where the marketing most often gets ahead of the evidence.

Pandit S et al. (2016, Andrologia, randomized, double-blind, placebo-controlled) gave healthy men aged 45 to 55 purified shilajit at 250mg twice daily for 90 days. Results: statistically significant increases in total testosterone, free testosterone, and DHEAS versus placebo, with LH and FSH levels maintained. The figures often quoted alongside it (a roughly 23% testosterone rise, plus higher sperm count and FSH) come from a different, smaller study: Biswas TK et al. (2010, Andrologia), which gave 100mg twice daily for 90 days to men with low sperm counts, without a placebo group (28 completers).

Three things to hold in mind when reading these results.

First, the healthy-men evidence is a single trial from one research group, not yet independently replicated. The 23% figure comes from men with low sperm counts in an uncontrolled study, and it should not be read as the expected effect in a healthy 40-year-old executive with normal baseline testosterone.

Second, a statistically significant rise is not the same as a large one. Even a 23% gain from 400 ng/dL (low-normal) would land at 492 ng/dL, still within normal range. If the marketing implication is "shilajit turns normal testosterone into something exceptional," the data does not support that reading.

Third, the Pandit trial used a purified extract at 500mg/day (250mg twice daily). Raw resin or underdosed products have no standing to cite this trial's results.

The honest summary: shilajit has early data for testosterone support, from one placebo-controlled trial in healthy men aged 45 to 55 and one uncontrolled study in men with low sperm counts. The evidence base is small and needs replication. Worth including in a performance stack for the mitochondrial mechanism; the testosterone angle is a secondary and modest potential benefit, not the headline.

Dose: 250 to 500mg of purified extract

The human studies used 200 to 500mg daily: 250mg twice daily in Pandit 2016, 250 or 500mg once daily in Keller 2019, and 100mg twice daily in the smaller Biswas 2010 study. Some protocols use a single 500mg dose. The range 250 to 500mg daily of a standardized purified extract is where the evidence base sits.

Primal Forge contains a purified shilajit adaptogen complex at a dose consistent with this range. The label states the form and amount.

Timing: shilajit is typically taken with food. The fulvic acid fraction is fat-soluble to a degree; taking with a meal that contains some fat improves absorption. Morning is the most common protocol timing, aligning with energy-support goals.

Duration: the Pandit 2016 trial ran 90 days. A 60 to 90 day committed protocol before evaluating response is the standard frame, not a two-week test.

Sourcing and heavy metal risk

This is not a footnote. It is a primary purchase criterion.

Unprocessed shilajit collected from high-altitude rock faces accumulates heavy metals from surrounding geology, particularly arsenic, lead, mercury, and cadmium. A 2024 review in Biological Trace Element Research (Hussain and Saeed) found that shilajit can carry toxic metals including lead, arsenic, cadmium, and mercury; most reported samples were below WHO and FDA limits, but some studies reported levels above them.

Purification processes, when done correctly, reduce or eliminate these contaminants. PrimaVie undergoes solvent-free purification with tested heavy metal levels. The Certificate of Analysis should show below-limit results for arsenic, lead, mercury, and cadmium.

Buying shilajit without a supplier-provided, third-party tested CoA is a meaningful risk. This is one category where the cheapest product is actively dangerous, not just suboptimal.

Stacking with creatine: rationale

Creatine Surge and Primal Forge target different parts of the energy system.

Creatine loads the phosphocreatine system, the rapid-burst ATP replenishment pathway dominant during high-intensity effort (1 to 10 seconds peak output). Shilajit's proposed mechanism is mitochondrial efficiency, the aerobic ATP generation pathway that dominates during sustained effort and recovery.

Taking both addresses the two timescales of energy production that a 40+ executive training 3 to 4 times per week actually needs: the acute power output per set (creatine domain) and the between-set and between-session recovery efficiency (mitochondrial domain).

There is no known interaction between creatine and fulvic acid. Take creatine post-workout (or at any consistent daily time). Take shilajit with a fat-containing meal, morning protocol. For more on creatine dosing and the phosphocreatine case for the 40+ executive, see Creatine for Executives Over 40.

Who should not take shilajit

• Hemochromatosis (iron overload disorder): shilajit contains bioavailable iron and fulvic acid enhances mineral absorption. In hemochromatosis, adding an iron-enhancing compound could worsen iron accumulation. Contraindicated.
• Sickle cell anemia and thalassemia: same iron-absorption concern applies.
• Gout: shilajit contains purines. If your uric acid levels are already elevated and you are managing gout, additional purine load is relevant to discuss with your physician.
• Immunosuppressant medications post-transplant: the immune-modulating properties proposed for shilajit have not been studied in immunosuppressed populations. Unclear interaction profile.
• Pregnancy and lactation: no safety data. Avoid.

How to measure whether it is working

Shilajit is not a compound that produces an acute perceptible effect in most people. It is not stimulant-based. The signal you are looking for is cumulative and indirect.

After 8 to 12 weeks, compare: perceived energy at the end of training sessions (less drop-off than pre-protocol), HRV trend on your wearable (more stable or improving baseline), and subjective recovery quality between sessions. These are soft signals. The CoQ10 bioavailability data suggests that if you are taking CoQ10 alongside, you may see a larger CoQ10-associated effect than you would from CoQ10 alone.

The only hard measurement is bloodwork. If testosterone is a concern, baseline and post-90-day total testosterone and free testosterone will show whether the hormonal signal is present for your individual biology.

FAQ

Is raw shilajit resin better than a purified extract?

No. Raw resin may contain heavy metals, fungal contamination, and unstandardized active content. The clinical evidence was generated using purified standardized extracts, not raw resin. Raw resin from an unverified supplier is a contamination risk, not a premium product.

How long until I notice anything from shilajit?

Most reported effects (energy stability, recovery) are cumulative. Do not evaluate before 6 to 8 weeks. Acute stimulant-type effects are not part of the shilajit mechanism.

Does shilajit interact with ashwagandha?

No known pharmacological interaction. They operate via different axes: shilajit via mitochondrial fulvic acid mechanism, ashwagandha via HPA axis modulation. Stacking them is common in Ayurvedic protocols with no established safety concern in healthy adults. See Ashwagandha Apex and the cycling protocol at Ashwagandha Cortisol Cycling Protocol.

Can women take shilajit?

The published trials are predominantly in male populations. The mitochondrial mechanism is not sex-specific. The testosterone discussion does not translate directly to female hormonal physiology. If you are female and considering shilajit, discuss with a healthcare provider familiar with your hormonal context.

What is the difference between Primal Forge and a generic shilajit capsule?

The critical difference is sourcing, purification standard, and heavy metal testing. Generic capsules with no CoA documentation have unknown contamination profiles. Primal Forge uses a purified shilajit extract with documented testing.

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Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement, especially if you take prescription medications or have a medical condition.

Key studies on this topic

Peer-reviewed research on the questions covered above. Links open the abstract on PubMed (U.S. National Library of Medicine).

1. Pandit S et al. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia, 2016. PubMed 26395129
2. Biswas TK et al. Clinical evaluation of spermatogenic activity of processed Shilajit in oligospermia. Andrologia, 2010. PubMed 20078516
3. Keller JL et al. The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels. J Int Soc Sports Nutr, 2019. PubMed 30728074
4. Carrasco-Gallardo C et al. Shilajit: a natural phytocomplex with potential procognitive activity. Int J Alzheimers Dis, 2012. PubMed 22482077
5. Hussain A et al. Hazardous or Advantageous: Uncovering the Roles of Heavy Metals and Humic Substances in Shilajit (Phyto-mineral) with Emphasis on Heavy Metals Toxicity and Their Detoxification Mechanisms. Biol Trace Elem Res, 2024. PubMed 38393486