It would seem that if they spent all the money to develop it AND it worked, NASA would have certainly used it. I'm seeing more comments indicating that it may not have actually been used by NASA astronauts after all.

This is why I was curious if anyone used it by itself. Some are reporting that they have used other things like supplements, medication and exercise in addition to the Marodyne, so they can't be certain if the machine worked or the supplements, medication and exercise worked.