Potential (mis)use of epigenetic age estimators by private companies and public agencies: human rights law should provide ethical guidance

Over the past decade, researchers in epigenetics have developed testing methods to predict the chronological and biological age of individuals based on levels of DNA methylation at combinations of CpG sites in specific cell types. These epigenetic age and aging estimators, also referred to as 'epigenetic clocks', represent a promising avenue to better understand the biological pathways underlying the development of aging-associated disorders, and imagine biomedical and/or social interventions to prevent, reverse, or alleviate them. Epigenetic clock technologies aimed at testing for epigenetic age of different cell types also provide an opportunity to investigate how environmental stressors, social adversity, and unhealthy lifestyle can contribute to such disorders through epigenetic aging acceleration. In addition to their potential clinical and public health applications, epigenetic age and aging estimators may be used for non-medical purposes, such as insurance and forensic sciences. In this article, we present and discuss a set of potential ethical, legal, and social implications of non-medical uses of epigenetic clocks. We highlight concerns related to actuarial and moral fairness, free and informed consent, data governance and the protection of privacy, equity and non-discrimination principles, identification and surveillance, the moral liability of criminals, as well as scientific validity, test accuracy, and interpretation of test results. We argue that a human rights framework should guide further discussions about these important and timely questions.