Herbalife's products are produced at the company's five manufacturing facilities in the U.S. and China as well as third-party manufacturing partners. The company's production process is based on a 'seed to feed' strategy which the company initiated in the 2010s and allows it trace where the ingredients in its nutritional products originated. Since 2013, the company has operated a botanical extraction facility in Changsha, Hunan Province. The facility produces botanical extracts, including teas, guarana, chamomile, broccoli, and bilberry, for use in many of the company's products. Before extracts are processed they undergo a botanical identification program and are tested several times throughout the production process. The processed raw materials from the extraction facility are used at all of the company's branded manufacturing facilities as well as its partners. As of 2015, 58 percent of the company's nutrition products were manufactured at Herbalife owned facilities.