The effect using clenbuterol as an additive in pig feed is leaner pigs with better feed conversion rates.
Police busted a criminal ring that was involved in the manufacture and sale of clenbuterol in 63 cities nationwide, reported Xinhua, which quoted Xu Hu, a senior official of the Ministry of Public Security.
Authorities launched a food safety campaign in March of this year, with a focus on clenbuterol. A total of 2,000 police officers in the provinces of Hunan, Sichuan, Hubei and Henan, as well as Tianjin Municipality, participated in the latest bust.
Police seized 2.5 tons of clenbuterol and closed six illegal laboratories, 12 production lines, 19 processing and storage sites and 32 "underground" factories during the cleanup Xu said.