ChromaDex is a dietary supplement and food ingredient company based in Los Angeles, California founded in 1999 that is publicly traded on the NASDAQ. In 2011, ChromaDex licensed patents from Dartmouth College, Cornell University, and Washington University in St. Louis regarding nicotinamide riboside, which it markets and sells as an ingredient under the brand name Niagen. ChromaDex licensed patents from the University of Mississippi and the USDA to commercially develop pterostilbene and sell the compound under the brand name pTeroPure. ChromaDex no longer sells pTeroPure. Wikipedia