  A brief review is given of recent analyses of the effects of CP phases on the
supersymmetric QCD and supersymmetric electroweak contibutions to the $b$ and
$t$ quark masses and to the $\tau$ lepton mass in SUGRA models. The effects of
CP phases on the supersymmetric contributions are found to be significanlty
large for the b quark mass as they can change both its sign and its magnitude.
Thus with the inclusion of CP phases the supersymmetric correction to the b
quark mass can be as much as fifty percent or more of the total b quark mass.
For the case of the $\tau$ lepton, the effects of CP phases on the
supersymmetric correction is also relatively large as it can again affect both
the sign and the magnitude of the $\tau$ mass correction. However, in this case
the overall correction is found to be only a few percent. The effect of CP
phases on SUSY contribution to the $t$ quark mass was also investigated.
However, in this case the overall correction is less than a percent with or
without the inclusion of phases. These results have important implications for
$b-\tau$ unification and for $b-t-\tau$ unification in the context of unified
theories.
