而且还是合法的
http://www.inspection.gc.ca/animals/feeds/medicating-ingredients/mib/mib-82/eng/1331129686310/1331129741124
Ractopamine 瘦肉精
Ractopamine Hydrochloride - MIB #82Date Revised: 2010-10
Approved Brands
PAYLEAN 20 PREMIX contains ractopamine hydrochloride at 20 g/kg (Elanco).
OPTAFLEXX 100...