Shilajit (also called mumie or moomiyo) is a semi-solid mineral and plant substance (a "phyto-mineral") used in Ayurvedic medicine as a "rasayana" or rejuvenator. As a supplement it is sold for energy, fatigue and testosterone, and its main compounds are thought to be fulvic acid and dibenzo-alpha-pyrones.
Also known as: mumie, moomiyo, mumijo, fulvic acid.
The one testosterone trial we found used 250 mg of purified shilajit twice a day for 90 days (Pandit 2016). These are study protocols, not a recommendation.
It is sold in the US as a dietary supplement. Under the 1994 dietary supplement law (DSHEA), FDA does not approve dietary supplements before they are marketed, and the maker, not FDA, is responsible for safety and labeling.
What studies show: in a placebo-controlled trial of healthy men aged 45 to 55, purified shilajit for 90 days raised total testosterone, free testosterone and DHEA-S compared with placebo (Pandit 2016). A 2014 review (Stohs) says relatively few well-controlled human studies exist and that more studies with standardized products are needed; most research is in animals or cells.
Heavy metals: a 2024 review (Hussain) found that shilajit can contain around 65 metals, including lead, arsenic, cadmium and mercury. Levels in most reports were below WHO and FDA limits for herbal drugs, but some studies found levels above them, and the authors say taking shilajit without knowing its metal content is not safe. Products vary, and raw or unpurified shilajit is the concern they describe.
We could not find a single published half-life or time to peak for shilajit that applies to a supplement dose, so we do not list one. Herbal products are mixtures of many plant compounds, so no single figure would describe them.
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