The half-life of a chemical is defined as:
the period of time it takes for a substance undergoing decay to decrease by half
Scientists have many questions about the path of polychlorinated biphenyls (PCBs) once they enter the human body. A recently published article in Environmental Health Perspectives examines the half-life of PCBs within the human biological system:
Our results are further evidence that a maximum intrinsic elimination half-life for persistent chemicals such as PCBs exists and is approximately 10-15 years.
In other words, PCBs hang around for a long time. Once PCBs enter your body, it will take 10-15 years for half of the initially consumed amount to pass out of your body, on average. These findings are an important contribution to our understanding of PCB activity within biological systems and confirm the notion that PCBs linger in our bodies long after we consume them. To read more about this study, click here.