In this article we explore the contribution from social anthropology to the medical ethical debates about the use of informed consent in research, based on blood samples and other forms of tissue. The article springs from a project exploring donors’ motivation for providing blood and healthcare data for genetic research to be executed by a Swedish start-up genomics company. This article is not confined to empirical findings, however, as we suggest that anthropology provides reason to reassess the theoretical understanding of (...) autonomy as generally defined by Beauchamp and Childress. Careful consideration of the trust expressed by donors through the act of donation, furthermore, suggests that there is reason to redirect the ethical scrutiny from informed consent to issues concerning institutional arrangements and social responsibility. In particular, we suggest that an anthropological approach could facilitate a reconsideration of the political implications of using informed consent as a regulatory practice in tissue-based research. (shrink)