U.S. Drug Enforcement Administration
According to the DEA, companies in India and China are principally responsible for manufacturing and exporting the synthetic stimulants. Shippers typically mislabel the products to evade detection by law enforcement and sell them via the internet to distributors around the world. Small retailers then sell the drugs online, through traditional distribution methods, or by retail distribution at convenience stores, gas stations, and "head shops."
Read more about the serious problems associated with "bath salts" in Psychiatric News at http://pn.psychiatryonline.org/content/46/8/8.1.full.