This article addresses the socioeconomic gradient in immigrant health by exploring immigration status and social capital as key considerations in measurement and development of health-promoting research and practice. This paper also seeks to draw attention to the importance of understanding how researchers approach the study of health disparities affecting minoritized and immigrant populations. A critical examination of the measures used in comparative health research challenges scholars to consider the different pathways through which socio-economic factors impact health and underscores the ethical commitment of health disparities researchers to consider the relevance and implications of their work. Given the reliance on existing data from national population health surveys to test the assumptions of the immigrant paradox, any immigrant-specific measure of SES with limited application to a large, representative sample of immigrants would likely hold little appeal to both researchers and practitioners. Understanding the mechanisms through which socioeconomic status influences immigrant health can allow scholars to address the needs of immigrant populations and advocate more effectively for programs and policies that seek to advance the health of all people.