Reducing Exposures to Endocrine Disruptors (REED) study, a personalized at-home intervention program to reduce exposure to endocrine disrupting chemicals among a child-bearing age cohort: study protocol for a randomized controlled trial.
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BACKGROUND: Exposures to endocrine disrupting chemicals (EDCs) have been linked to chronic diseases including breast cancer, metabolic syndrome, diabetes, and infertility. Exposure during pregnancy may have a lifelong impact on the fetus. Services are needed to allow individuals to learn about their personal EDC exposures and how to reduce them. Million Marker (MM) aims to crowdsource and scale the biomonitoring of environmental chemicals and provide actionable results to empower individuals to proactively assess, track, and reduce their EDC exposures. In previous research, we developed and tested the first mobile EDC intervention service (mail-in urine testing and exposure report-back) for its efficacy in increasing EH literacy (EHL), willingness to reduce exposures (i.e., readiness to change, RtC), and system usability. After intervention, we found increased EHL, increased RtC in women (but not men), and decreased EDC exposure. However, some participants did not increase their RtC and had difficulty carrying out the intervention on their own. The reasons for these less optimal results were the difficulty in the EHL subject matter-participants still felt ill-prepared to apply their knowledge to making healthier lifestyle changes. Therefore, in this study, we will address these perceived limitations. METHODS: We will test a self-directed online interactive curriculum with live counseling sessions and individualized support modeled after the highly effective Diabetes Prevention Program (DPP). Recruiting from the Healthy Nevada Project (HNP), one of the largest population health cohorts in the world, we test the effectiveness of our EDC-specific online intervention curriculum via EHL and RtC surveys and determine changes in EDC exposure before and after intervention in a randomized controlled trial. We will also test for common clinical biomarkers via a commercially available at-home test (Siphox). We will recruit and randomize 300 women and 300 men of reproductive age (total n=600) from HNP. Our target population is men and women of reproductive age (18-44 years old). DISCUSSION: At the conclusion of this project, we will be well-positioned to scale our services to clinics and the general public, with the eventual aims of FDA approval, insurance coverage, and incorporation into routine clinical care.