  We discuss the implications of global symmetries on the radiative corrections
to the Higgs sector. We focus on two examples: the charged Higgs mass in the
minimal supersymmetric model and the Higgs couplings to vector boson pairs. In
the first case, we find that in the absence of squark mixing a global
SU(2)$\times$SU(2) symmetry protects the charged Higgs mass from corrections of
${\cal O}(g^2m^4_t/m^2_W)$. In the second case, it is the {\it custodial}
symmetry which plays an analogous role in constraining the fermion-mass
dependence of the radiative corrections.
