  In this talk we consider the modifications induced by heavy physics on the
triviality and vacuum stability bounds on the Higgs-boson mass. We parameterize
the heavy interactions using an effective Lagrangian and find that the
triviality bound is essentially unaffected for weakly-coupled heavy physics. In
contrast there are significant modifications in the stability bound that for a
light Higgs boson require a scale of new physics of the order of a few TeV.
