This podcast episode delves into the world of xenobiotics, foreign chemicals that enter our bodies and the environment. These substances include microplastics, PFASs, and many others. While some xenobiotics can be beneficial at certain doses, others have harmful effects. They are ubiquitous in our daily lives, found in everything from cosmetics to water and even the Arctic. The body processes xenobiotics through absorption, distribution, biotransformation, metabolism, and elimination, which can impact our health. Moreover, these chemicals can linger in the body for years, potentially causing health issues. By understanding the prevalence, impacts, and routes of exposure to xenobiotics, we can make informed choices to minimize their effects on our well-being and the environment.