My feeling is that a true partner should want his or her S.O. to grow and thrive in every way. Relationships stagnate and/or fall apart when one person wants to grow spiritually and the other is threatened by it, and I use "spiritually" in a broad enough sense here as to include alternative health practices. The flip side is that the person doing the "growing" can be the impetus and guide for the person who is not as enthusiastic. But, as with anything, a closed mind is gonna lead to trouble.
In my experience, when we get healthy, other people have to or they fall out of ranks. (I remember, for instance, when one of my friends a few years ago stopped going out at night and took up marathon running...I just could not deal with her "abandoning" me -- even though she was taking really positive steps and necessary ones...so I fell out of her life. Had I been a better person and/or friend, I would have tried to follow her down that path in a supportive way (not that you would ever catch me *running*!) somehow. But it was REALLY threatening to me and I couldn't. Etc.)