The unfairness of health inequalities depends on the more fundamental question of the relationship between justice in health and distributive justice more generally. In this article, I discuss some constraints on how health should be incorporated in a theory of justice and their implications for when health inequalities can be considered to be unfair. I argue against adopting separate distributive principles for health, and in favour of conceiving justice in health as interrelated with, and contingent on, justice in the distribution of other important social goods and resources, in particular income. Accordingly, health inequalities are unfair when they are the result of an unfair distribution of resources.