The first to ever calculate the empirical molecular formula for a human being were American limnologists Robert Sterner and James Elser who in April of 2000 calculated the following 22-element empirical formula:
Sterner and Elser published their results in the 2002 book Ecological Stoichiometry: the Biology of Elements from Molecules to the Biosphere. The second to calculate the empirical molecular formula for a human being was American chemical engineer Libb Thims, who being unaware of the work of Sterner and Elser, in September of 2002 calculated the following 26-element empirical formula:
Thims published his results in the 2002 manuscript Human Thermodynamics (Volume One), in the 2005 IoHT (online) Molecular Evolution Table, and in the 2007 textbook Human Chemistry (Volume One). For an average 70-kg human being, this empirical formula translates to the following human molecular formula:
In shorthand, symbols are commonly used to signify the human molecule, such as Mx = male and Fy = female, or letter shorthand: A, B, AB, ABC, etc.