Shilajit is a nutrient-rich, sticky, tar-like substance primarily found in Himalayan rocks, formed over centuries by decomposing plant matter. Used in Ayurvedic medicine as an adaptogen, it contains 60–80% fulvic acid, along with humic acid, minerals, and amino acids. It is used to boost energy, improve testosterone, enhance cognitive function, and reduce inflammation, though high-quality human research is limited.