Meaning HRT or TRT. No taking supraphysiological doses.
Something is amiss here, maybe just because we are speaking in a casual environment but with hormonal issues i think the terminology is very important. Especially wrt women. I am definitely not an expert in women's use so I hope I don't embarrass myself here but the reason I engaged you in this convo is the hope that we can keep any harm from coming to your female friend.
So with that disclaimer please take everything else following with a healthy dose of "as far as I know" and keep in my that I'm not trying to be condescending but I will speak bluntly.
HRT and TRT are by definition both
Replacement
Therapies. Var is not a naturally occurring substance in the body so it can't be considered to be replacing anything. Var is not Testosterone, it is not even directly derived from Test, it is a derivative of DHT. However, introducing Var to the system will trigger the feedback loops that affect Test production and if anything it will cause natural Test production to slow, so no fear whatsoever about ending up with supra levels of Test. I am aware that this is a very low dose we are discussing and female natural Test is also normally produce at a very low level (compared to men). I'm also aware that some like to argue that Var won't cause "HPTA shutdown" especially at low doses.
Regardless of if one believes that or not (I don't) none of this adds up to "optimizing Test", I submit that it would be more accurate to describe the effect as "creating hormonal chaos".
Now if I had to bet I'd lean towards thinking that none of what I just wrote is of to much concern to either of us because more likely what you really were getting at is that you would like to know the suggested dose that would keep her below the threshold level of Var that would get her into the chaos zone. If that assumption is correct my answer would be 5-10mg/day is the range I have heard from most but I'd recommend waiting for more replies or continuing to investigate for opinions from some more experienced with female use than myself. Perhaps moving the thread to or staring a new thread in the Anabolics for Her section would be prudent?
Hope you take that all as coming from a good place, pressed for time so please excuse the bluntness. Happy to discuss further anytime.