Shilajit Supplement Review 2026: Testosterone, Energy, and the Contamination Risk

Quick answer: Shilajit is a tar-like mineral pitch formed over centuries from decomposed plant material compressed in Himalayan rock formations. It contains over 85 minerals including fulvic acid — the primary bioactive compound. Human RCT evidence supports shilajit for testosterone support in healthy men (+23.5% in one trial), mitochondrial energy production (clinical trials in chronic fatigue), and cognitive function. The heavy metal contamination risk is real and makes third-party testing non-negotiable.

What Is Shilajit and How Does It Work?

Shilajit (also called “mumijo” in Russian and Central Asian traditions) is a blackish-brown exudate collected from rock fissures in the Himalayas, Caucasus, and Altai mountains at altitudes of 1,000–5,000 metres. It forms over millions of years from the compression of organic plant material by geological forces. The resulting substance is extraordinarily mineral-dense — over 85 minerals in ionic form — with fulvic acid (15–20% by weight) as the primary bioactive compound. Fulvic acid enhances cellular nutrient uptake, has antioxidant properties, and appears to modulate mitochondrial function via complex I of the electron transport chain.

Human Clinical Evidence

Testosterone

A 2016 randomised, double-blind, placebo-controlled trial published in Andrologia gave 250mg purified shilajit twice daily for 90 days to healthy men aged 45–55. Results: total testosterone increased 23.5%, free testosterone increased 19.2%, and DHEAS levels increased significantly vs placebo. A 2015 study in men with oligospermia (low sperm count) found similar testosterone increases alongside significant improvements in sperm count and motility.

Mitochondrial energy

A 2019 clinical study found PrimaVie shilajit (the standardised, most-studied form) significantly increased mitochondrial function markers and reduced fatigue scores in healthy adults after 8 weeks. The mechanism involves CoQ10 and fulvic acid working synergistically on mitochondrial Complex I — shilajit may enhance the efficacy of CoQ10 supplementation when the two are taken together.

The Heavy Metal Warning

Raw shilajit from unverified sources has tested positive for dangerous levels of lead, arsenic, mercury, and cadmium. The FDA has issued warnings about specific shilajit products with heavy metal contamination. Only purchase from brands that publish independent third-party heavy metal test results. The branded form PrimaVie undergoes rigorous purification and testing — it is the only form with published human clinical trials.

Dosing

Clinical trials used 250mg twice daily of standardised shilajit extract (PrimaVie, standardised to 50% fulvic acid). Resin form is the traditional delivery method — a pea-sized amount (approximately 300–500mg) dissolved in warm water or milk. Capsules are more convenient and easier to dose accurately. Cycle 12 weeks on, 4 weeks off.

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