Pseudospin symmetry relates the l-forbidden magnetic dipole transition stre
ngths between pseudospin partners to the magnetic moments of the involved s
tates. These relations are tested against experimental data after correctio
n for the fragmentation of the single particle strengths. Within typical un
certainties of the experimental spectroscopic factors good agreement is fou
nd for a wide, range of shell closures Z = 20-82, N = 20 - 126, and pseudo-
orbital angular momenta. Systematic deviations are observed for particle st
ates above N = 28 and Z = 50 where the predicted B(M1) values are about an
order of magnitude too large.