Endocrine disruptors wreak havoc on our bodies by mimicking, blocking, and interfering with hormone production, modifying the body's sensitivity to hormones, triggering premature cell death, competing with essential nutrients, binding to vital hormones, and accumulating in organs. What Is the Endocrine System? The endocrine system regulates key functions in the body by secreting hormones into the bloodstream. These hormones relay messages to cells and help maintain whole-bod