As with other seafood items from China, imported shrimp shouldn’t be at the top of your grocery list. A few years ago, the Institute of Environmental and Human Health food lab at Texas Tech University studied different bags of shrimp bought from different stores around the US. At the conclusion of their study, they reported that every sample was contaminated with enrofloxacin, chloramphenicol, and carcinogen nitrofurazone. 

Each of these substances is available in antibiotics that are illegal in the US. Due to the conditions in China, the shrimp are exposed to all of them. Consequentially, anyone who buys the shrimp then ingests those substances.