  The current in noncentrosymmetric metals in normal and superconducting state
is found in frame of linear response theory. In line with usual terms
corresponding diamagnetic response, the Landau diamagnetism and the Pauli
paramagnetism the general expression contains also the terms corresponding to
spacial dispersion specific for a medium without space parity. This, so called,
gyrotropic current is calculated in zero frequency case as well in infrared
frequency region. The static gyrotropic current yields negligibly small
correction to the London magnetostatics in a superconductor without inversion
center. Whereas the high frequency response produces the natural-optical
activity revealed f.e. in the Kerr effect. The magnitude of the Kerr angle in
infrared frequency region is proved to be in reasonable correspondence with
recently reported observations of the Kerr effect in the pseudogap phase in
several different high Tc materials.
