The idea of living chemistry - integrating the biology of the body and its chemical components and interactions - seems pretty straightforward to me, but apparently this is a new concept for scientists.
Not that body chemistry hasn't been discussed before; commercials advertising for deodorant used to tout how women's body chemistry was so different from men's that they required and entirely separate formula (mostly just a different smell added).
Perhaps it isn't a new fiedl so much as it is an intensified field. With humanity teetering on the precipice of discoveries to end potentially life-threatening diseases, then cooperation between chemists studying the chemical architecture of the body and biologists studying the functions of it, the possibilities are exciting and intriguing.
Plus, it is interesting to visualize the periodic table coursing through your veins...I wonder what my atomic weight is....