They also note that other steroids with similar chemical structures can regenerate in the same way, including dienogest, an oral contraceptive, and dienedione, an illicit anabolic steroid. (scientificamerican.com)
If the authors mean to say that some of the more than 750 chemicals added throughout the fracking process can be likened to PCBs or pesticides because of similar chemical structure, they might spend a bit more ink supporting that observation, and less making scary allegations. (treehugger.com)
The gluten in many grains, when not digested properly, turn into substances, called gluteomorphins, with similar chemical structures to opiates, such as morphine and heroin. (myersdetox.com)