  The ultraviolet regularisation of Yukawa theory in de Sitter space is
considered. We rederive the one-loop effective Candelas-Raine potentials, such
that they agree with the corresponding Coleman-Weinberg potentials in flat
space. Within supersymmetry, this provides a mechanism for the lifting of flat
directions during inflation. For the purpose of calculating loop integrals, we
employ the dimensional regularisation procedure by Onemli and Woodard and show
explicitly that the resulting self-energies are also invariant. This implies
the absence anomalous de Sitter breaking terms, which are reported in the
literature. Furthermore, transplanckian effects do not necessarily leave an
imprint on the spectrum of cosmic perturbations generated during inflation.
