Shilajit: energy, testosterone… what does the evidence really say?

Article updated on 6 September 2026.

Shilajit is often presented as a natural solution for energy, testosterone or performance. However, human data is limited and relates to specific preparations. It does not justify promising the same effects with just any resin sold online.

Which product are we talking about?

Shilajit refers to a complex substance of mineral and organic origin, used in certain Ayurvedic traditions. Its composition may vary. A study on a purified extract therefore does not automatically allow conclusions to be drawn about raw resin, a capsule containing a blend of several plants, or a product whose origin is not documented.

The word ‘natural’ describes a presumed origin, not a level of safety. Similarly, a very dark colour or a sticky texture do not constitute a test of authenticity that can be carried out at home.

What the often-cited study on testosterone reveals

A double-blind, randomised trial published in *Andrologia* investigated purified shilajit in healthy men aged between 45 and 55 over a period of 90 days. The authors observed an increase in certain hormonal markers compared with the placebo. Source: study by Pandit et al.

This result does not demonstrate that the product brings about a lasting improvement in strength, fertility, fatigue or quality of life in all consumers. A blood test result and a perceived benefit are two different criteria. Nor is the study sufficient to recommend shilajit as a treatment for a hormonal deficiency.

Three promises, three questions to ask

The proposed biological mechanism may suggest an interesting hypothesis. It is no substitute for robust human trials. If a seller cites a study, check that the product on sale actually corresponds to the formulation studied.

Quality is a prerequisite, not proof of effectiveness

The NCCIH points out that certain Ayurvedic preparations may contain toxic metals and that their benefits are not always supported by high-quality trials. This does not prove that every shilajit product is contaminated; it does, however, make traceability and appropriate checks essential. Source: NCCIH, Ayurvedic medicine.

• Clearly identify the manufacturer, importer and batch number.
• Request test results relating to the batch sold, carried out by an identifiable laboratory.
• Ensure that testing covers relevant contaminants and microbiological quality.
• Be wary of a simple claim such as ‘100% pure’ without any verifiable method or documentation.

Even a properly tested product does not turn limited clinical evidence into a guaranteed benefit. The quality of the batch and the effectiveness of the supplement are two separate issues.

If you’re feeling tired, start by addressing the cause

Persistent tiredness can have many causes: insufficient recovery, an inadequate diet, illness or the side effects of medication. Buying a supplement before understanding the situation may delay effective treatment. A decrease in libido or a suspected hormone deficiency also warrants a discussion with a doctor.

If you are pregnant, breastfeeding, have a chronic illness or are undergoing regular medical treatment, seek professional advice before use. This precaution is particularly important where the composition varies and interactions are poorly documented.

To compare levels of evidence, see also Creatine and cognition and The basics of recovery. No purchase is necessary to set these up.

Original illustration generated by AI.