Background: With the signing of the PACT Act in 2022, there is great interest and investment in studying toxic exposures encountered during military service. One way to address this is through the identification of epigenomic biomarkers associated with exposures. There is increasing evidence suggesting that exposure to toxic substances may result in alterations to DNA methylation and resultant gene expression. These epigenomic changes may lead to adverse health effects for exposed individuals and their offspring. While the development of epigenomic biomarkers for exposures could facilitate understanding of these exposure-related health effects, such testing could also provide unwanted information. Objectives: Explore Veterans' attitudes toward epigenomic biomarker research and the potential to test for past exposures that could pose intergenerational risk. Methods: Semi-structured interviews with Veterans (n=22) who experienced potentially harmful exposures during their military service. Results: Twenty Veterans said they would hypothetically want to receive epigenomic information related to their toxic exposures and potential health impacts as part of a research study. Veterans identified nine potential benefits of this research, including promoting insights concerning intergenerational health, identification of early health interventions to mitigate the impact of exposures, and additional knowledge or explanation for their experiences. At the same time, 16 participants noted potential risks, including psychological distress in response to results, concerns about receiving non-actionable, uncertain, or inaccurate results, and issues related to privacy and discrimination. Ten participants also identified at least one condition in their children that they thought could be related to their exposure and most said they would be interested in receiving research results related to their children's and grandchildren's risk of developing a health condition associated with their exposure. Discussion: Results suggest that Veterans might welcome benefits of epigenomic research related to military exposures yet have some concerns about potential negative impacts.

The authors have declared no competing interest.

Funding for this research was provided by the Gulf Coast Center for Precision Environmental Health (NIH P30 ES030285) through a National Institute of Environmental Health Sciences Center Pilot Project grant. This research was also supported in part by the U.S. Department of Veterans Affairs, Veterans Health Administration, Health Services Research and Development Services at the Center for Innovations in Quality, Effectiveness and Safety (IQuESt; CIN 13-413), Michael E. DeBakey VA Medical Center, Houston, TX.

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The IRB of Baylor College of Medicine gave ethical approval for this work.

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