Fact is, competitive bodybuilding does seem to attract many who suffer some type of personality disorder.
To be so Kamikaze with regard to drug/hormone usage speaks to this.
These guys/gals are not dabbling with anabolic steroids here and there. They're abusing hormones and chemicals on a scale few can comprehend.
As someone said earlier in the thread, perhaps it was bodybuilding that kept Denise on the (relatively-speaking) straight and narrow, and when it went away, so did her remaining hold on her "normal" existence.
It's also interesting to note that her and Paul DeMayo were friends for a time, while each was pursuing bodybuilding success. And we all know Paul was damaged and became another casualty in the sport.