Ultramassive

He considers repetition of treatment after a 2-month interval more desirable than ultramassive doses.

In particular, there has been no confirmation of the point of view of western scientists who contend that there is an enormous ultramassive body at the center of the Galaxy.

It seems quite unlikely that these ultramassive exchange particles can be directly detected in the foreseeable future, but it would be sufficient to detect their effects, if those effects were completely unlike those produced by any other exchange particles. And such an effect does (or, at any rate, might) exist.