Radiative corrections, due to the P-odd part of the electroweak interaction, transform the T-odd, but P-even interaction into a T-odd and P-odd one. The experimental information about T-odd, P-odd effects is sufficiently rich to obtain in this way new limits on the parameters of T-odd, P-even electron-nucleon and nucleon-nucleon interactions, as well as on some β-decay parameters. These limits are much better than those known previously. For identical spin- 1 2 particles there is no local T-odd, P-even interaction at all.