First in-vivo brain conductivity reconstructions have been recently published. However, a large variation in the reconstructed conductivity values is reported and these results substantially differ from ex-vivo measurements. Given this lack of agreement, we performed an in-vivo study on eight healthy subjects to provide reference brain conductivity values. The measured in-vivo mean WM and GM conductivity values verify for the first time the literature values measured ex-vivo, while the reconstruction accuracy was verified in simulation settings. The presented values can therefore be used as a verified in-vivo reference for future studies, where new reconstruction algorithms are tested in-vivo.