Efforts to give a pro-nutrition focus to agriculture to address the problem of undernutrition in developing countries have predominantly focused on boosting production and/or consumption of nutritious foods by farm households. While this is clearly appropriate in countries where a large proportion of the poor have agriculture as their main source of livelihood, as in South Asia, it is increasingly recognised that a majority of the poor derive some or all of their food through markets (Henson et al. 2013).