  We consider aspects of the noncommutative approach to the standard model
based on the spectral action principle. We show that as a consequence of the
incorporation of the Clifford structures in the formalism, the spectral action
contains an extended scalar sector, with respect to the minimal Standard Model.
This may have interesting phenomenological consequences. Some of these new
scalar fields carry both weak isospin and colour indexes. We calculate the new
terms in spectral action due to the presence of these fields. Our analysis
demonstrates that the fermionic doubling in the noncommutative geometry is not
just a presence of spurious degrees of freedom, but it is an interesting and
peculiar property of the formalism, which leads to physically valuable
conclusions. Some of the new fields do not contribute to the physical fermionic
action, but they appear in the bosonic spectral action. Their contributions to
the Dirac operator correspond to couplings with the spurious fermions, which
are projected out.
