That what I've read, as well. The are studies underway to get more information about the physiological effects of low G, but until we have something like the proposed moon base we are using the ISS as a proxy, and it's effectively 0 G. We do know 0G isn't good for us, and the longer we stay the more pronounced the problems.

Until we have more information and a way to mitigate the problems, living in space or low G like the moon or Mars isn't feasible is my point. We aren't going to send people into an unknown hazard and then see if they live, or suffer. We will do years of studies and short trips before that happens.