  We employ notions familiar from supersymmetry for constructing the one-loop
functional of general quantum field theories with bosons and fermions (spin <
1). To demonstrate the advantages of such an approach for calculating one-loop
divergences, we analyse a simple Yukawa theory with two different versions of a
super-heat-kernel expansion. These methods also simplify the calculation of
one-loop divergences for non-renormalizable meson--baryon Lagrangians occurring
in chiral perturbation theory.
