Shilajit is a herbo-mineral resin that oozes from Himalayan rocks during hot weather. It is pale brown to blackish in color, soft and slimy texture, and soluble in water. Shilajit contains various resins like benzoic acid and hippuric acid as well as minerals including silica, iron, calcium, and zinc. It is used as a general tonic and stimulant and marketed in tablets and capsules by several companies to aid anti-aging and recovery.