In science, chemistry is the study of elements and the structures they form and is mainly concerned with effects that depend on the outer electrons in atoms. [1]

Human chemistry
The study of human molecules (people) or human elements and the structures they form, mainly concerned with effects that depend on the outer electrons in atoms, is called "human chemistry". [2]

References
1. Daintith, John. (2005). Oxford Dictionary of Chemistry. New York: Oxford University Press.
2. (a) Thims, Libb. (2007). Human Chemistry (Volume One), (preview). Morrisville, NC: LuLu.
(b) Thims, Libb. (2007). Human Chemistry (Volume Two), (preview). Morrisville, NC: LuLu.