In human chemistry, human chemical element was one of the terms, along with human element and human chemical, used by American engineer William Fairburn, in his 1914 booklet Human Chemistry, to describe an individual person, whom, as he eluded to, were made of combinations of the eighty-one known elements. 
1. Fairburn, William A. (1914). Human Chemistry (pgs. 2-4, 12-13). The Nation Valley Press, Inc.