A synthetic growth hormone used in cattle production may persist longer in the environment than previously thought. CREDIT: Shutterstock Trenbolone acetate, or TBA, is a synthetic growth promoter used extensively in the cattle industry to help cows add muscle mass quickly. Implanted in the ears of over 20 million cows annually, cattle metabolize TBA to create 17-alpha-trenbolone, an endocrine disruptor that can end up in streams or rivers due to feedlot runoff or cattle manure applied to cropland.
Common Growth Hormone Used In Cattle Could Have Serious Environmental Impacts
Natasha Geiling, Think Progress
Fri, 05/08/2015 - 5:45am
Topics: shutterstock trenbolone nature communications adam ward indiana university s school public environmental affairs this david cwiertny iowa when tba science friday s the common growth hormone used in cattle could have serious environmental impacts tba ward ward in university thinkprogress when in cwiertny study metabolites sunlight compounds concentrations longer chemicals regulatory focused persist previously risk thought manage don wrong slower percent cows beef rapidly create release streams discovered risks runoff pollution time weren exposure compound breaks approach stresses metabolite produce professor breakdown current transport published higher ability process didn synthetic liter stream lab nanograms
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