Shilajit

Shilajit is one of the most heavily marketed supplements for men’s health — and the gap between marketing claims and clinical evidence is among the widest in the supplement industry. The promises of dramatic testosterone increases, enhanced fertility, and revitalized energy rest almost entirely on a single small trial conducted by researchers with industry ties. This is not a robust evidence base for the claims being made.

The single human RCT that supports testosterone claims is Pandit et al. (2016), which gave 200 mg of purified shilajit twice daily to 35 oligospermic men for 90 days. Total testosterone, free testosterone, and DHEA-S all increased significantly. This is a real finding — but it is one study, in one specific population (infertile men with low sperm counts), with a small sample size, conducted by researchers affiliated with the manufacturer. The extrapolation to ‘all men should take shilajit for testosterone’ is not supported by any evidence.

The mechanism is poorly understood. Shilajit contains fulvic acid (which may improve mitochondrial function and nutrient absorption) and dibenzo-α-pyrones (which have antioxidant properties). How these compounds increase testosterone is unclear — hypotheses include improved DHEA conversion or reduced oxidative stress in Leydig cells, but these are speculative and not supported by mechanistic studies in humans.

The safety concern that marketing rarely mentions is heavy metal contamination. Shilajit is a mineral pitch extracted from rocks — it naturally concentrates environmental contaminants. Multiple analyses have found lead, arsenic, cadmium, and mercury in unregulated shilajit products, sometimes at dangerous levels. Only products from reputable manufacturers with third-party heavy metal testing should be considered. Raw, unprocessed shilajit is particularly risky and should be avoided entirely.

Practical guidance: if you choose to use shilajit, use only purified, tested products from reputable manufacturers with visible third-party heavy metal certificates. Start with 300 mg daily with breakfast. Do not expect dramatic testosterone increases — the evidence does not support this for healthy men. If you have documented low testosterone, see an endocrinologist rather than self-treating with shilajit. Avoid completely if you have gout, hemochromatosis, or are pregnant. For men’s health support, ashwagandha KSM-66 and tongkat ali have stronger evidence bases and better safety profiles.

Marketing vs Evidence: The Testosterone Hype Machine

Shilajit marketing is among the most aggressive in the supplement industry. Claims of “300% testosterone increase,” “natural steroid alternative,” and “ancient Himalayan vitality secret” are common. None of these claims are supported by clinical evidence. The single positive trial showed modest increases in testosterone in oligospermic men — a specific population with documented hormonal abnormalities. The extrapolation to healthy men is not supported by any data.

The “ancient wisdom” narrative is also misleading. While shilajit has been used in Ayurvedic medicine for centuries, traditional use does not equate to clinical efficacy. Many substances used traditionally have been disproven by modern science, and many effective modern medicines have no traditional use history. The age of a practice is not evidence of its effectiveness.

Practical Guidance: Safety First with Shilajit

If you choose to use shilajit, safety should be your primary concern. Only purchase from manufacturers who provide third-party heavy metal testing certificates (testing for lead, arsenic, cadmium, and mercury). The certificate should show specific ppm (parts per million) values, not just a “pass/fail” result. If a manufacturer cannot provide this, do not purchase their product.

Start with 300 mg daily of purified extract, taken with breakfast. Do not exceed 500 mg daily unless specifically directed by a healthcare provider. Do not use raw, unprocessed shilajit — the purification process is essential for removing contaminants. If you experience gastrointestinal upset, reduce the dose or take with a larger meal.

For testosterone concerns, see an endocrinologist for proper evaluation. Self-treating with shilajit is not supported by evidence and may delay appropriate treatment for underlying conditions (hypogonadism, pituitary disorders, thyroid dysfunction). If you have documented low testosterone, prescription testosterone replacement therapy has far more evidence and better monitoring protocols than any supplement.

Avoid shilajit completely if you have gout, hemochromatosis, or are pregnant. Monitor for signs of heavy metal toxicity (fatigue, headache, joint pain, neurological symptoms) and discontinue if they occur.