Microplastics in the Body: Uncertain Risks Prompt Calls for Precaution

Despite mounting evidence that microplastics accumulate in human tissues (including the brain), scientists say the health impacts are not yet clear. Studies face measurement challenges and conflicting results, fueling a debate between taking precautionary action to reduce exposure and waiting for a stronger evidence base. U.S. agencies are moving toward research and potential regulation (eg, EPA’s drinking water plan and HHS’s STOMP initiative), while experts caution against premature policy moves and stress improving methods to better understand risks.