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California Regional Exposure (CARE) Study

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The California Regional Exposure (CARE) Study in Los Angeles County

Earlier this year, 430 Los Angeles County residents participated in the CARE Study. All study participants completed surveys and donated blood and urine samples. 

We tested samples from all participants for 10 metals, including mercury, cadmium, arsenic, and lead, and 12 perfluoroalkyl and polyfluoroalkyl substances (PFASs). For some participants, we also measured 1-nitropyrene, a chemical that shows if a person was exposed to diesel exhaust. 

We chose these chemicals based on many factors, including: (1) if they are commonly found in the environment or consumer products, and (2) if they are known or suspected to harm health. The CARE Study will help us learn more about chemical exposures across California. Your participation helps to support policy makers and communities in taking action to protect our environment and health.  

Timeline for Results

  • September - October 2018:  We will contact you directly if we find high levels of lead, mercury, arsenic, or cadmium in your samples.  
  • December 2018 - January 2019: If you requested your results, we will mail you detailed information about the levels of chemicals we measure in your blood and urine. The results packet will show how your results compare to the average levels in LA County and the U.S. You will also be given information on ways to help lower your exposure to these chemicals in the future.  
  • March - April 2019:  Summaries of study findings will be shared with the public.  These summaries represent the study population as a whole--we will never make your personal results available to anyone but you. 
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