The concept of social capital has grown into a burgeoning theoretical tool in multidisciplinary research and public discourse on health during the last two decades. The key figures who popularized this concept and stimulated its theoretical development include three sociologists, Pierre Bourdieu, James S. Coleman, and Nan Lin, and one political scientist, Robert D. Putnam. Their diverse definitions and operationalizations of social capital have stimulated extensive confusion and debate over its measurement and health consequences. Two perspectives are distinguishable (Song, Son, and Lin 2010; Song 2013a): the network‐based approach by Bourdieu and Lin, and the normative approach by Coleman and Putnam. The normative approach, Putnam's notion of social capital in particular, absorbed by public health researchers, has dominated the health literature. It is necessary to introduce these different frameworks of social capital and their applications in the health literature separately.