Abstract : Chemicals are key material features of the infrastructure of global health. While the models for disease control deployed in global health projects tend to treat chemicals as stable objects, I ask what might happen if we saw them instead as unstable things, implicated in fluid interactions. A view of health as constituted of things rather than objects has three advantages. First, it pushes theories of biopower in global health beyond attention to the bureaucratic regimes of life-management. Second, it shows how health-seeking practices belie neat spatial scales. Third, chemicals reveal the aesthetic nature of health.