Complex sentence: Due to the ubiquity of plastics (and therefore plasticizers) in modern life, the vast majority of people are exposed to some level of phthalates, and most Americans tested by the Centers for Disease Control and Prevention have metabolites of multiple phthalates in their urine.
Split into simpler sentences: Due to the ubiquity of plasticized plastics, the majority of people are exposed to some level of phthalates. For example, most Americans tested by the Centers for Disease Control and Prevention have metabolites of multiple phthalates in their urine.