My wife is 56 years old, fit and active. A year ago she wouldn't even take a pill for a headache.?

A year ago she began seeing a naturopath and began taking a large amount of medications to "enhance" her athletic performance. In spite of being concerned about the volume of medications she was taking I said nothing. Now she's decided that she needs to inject herself with non-steroidal drugs that she believes will further enhance her athletic performance. (This without consultation with a medical doctor). After a huge fight I presented her with an ultimatum - either stay married to and living with me OR commence sticking needles in her body. We have now separated. I have told her that she is not welcome to return home until she decides that our marriage is more important than needlessly sticking needles into herself. I believe that she is obsessive compulsive and has taken the first step towards steroid abuse. Am I wrong or should I just shut up and let her do as she pleases? We have been married for 35+ years and have never separated before.