Scientists have found that Ashwagandha, an active component in the leaves of the ayurvedic herbs induces sleep. This study by the researchers including one of India origin, have investigated the effect of Ashwaganda on sleep in mice. They found out that the the water extract of Ashwaganda leaf is rich in triethylene glycol (TEG) and promoted non-rapid eye movement (NREM) sleep significantly. The alcoholic extract containing active withanolides showed no effect on sleep. The sleep induced by TEG was similar to normal sleep.