I was on it as part of hrt - my gp was excellent and thoroughly tested me for testosterone and sex hormone binding globulin. they do a calculation to work out free testosterone from this, mine was 0. My Gp said, in her experience, 1/3 women love testosterone, 1/3 hate it and 1/3 find it does nothing.
it worked but I went to high. It also affected my thyroid levels (I’m on thyroxine) and I had to lower that too. (Libido was through the roof but my hair fell out! I was also extremely confident, which I found fascinating with regards to why trans identified females might take testosterone.)
I then had to come off all hrt it due to breast cancer.
what I’ve learned through it all though, from my experience with the excellent gp, and from some googling, is that SHBG is important in all this. If that’s too high, there’s not enough circulating free testosterone. Natural progesterone also helps balance SHBG, which in turn helps free testosterone
resistance training/ building lean muscle mass (also following correct nutrition to support / not starving yourself ) slightly increases testosterone and lowers SHBG. Good vitamin D levels help normalise SHBG. Stress worsens it.
my libido did fall off a cliff, everything shrivelled up down there and I stopped being able to orgasm when I came off hrt and started tamoxifen. It wasn’t nice. BUT over time (18 months) it’s slowly come back, even though I seem to be post menopausal now. The main thing I’ve been really focusing on is building lean muscle mass because I’ve been obviously so worried about bone density (it’s very hard to hear so much about hrt and not be allowed it.) I’ve channeled a lot into what I can do for myself; get really strong and eat well for brain, meno symptoms and bone health. And I’m wondering if I’ve been slowly balancing my hormones, particularly testosterone, in the process.
I still don’t think women are being given the full story of how hormones work and what might help them, as well as what self help options there are.
I think women should be offered access to testosterone but I think it should be much more closely monitored, explained, and also more information about the bigger picture, in order to make informed choices.
Interestingly there seems to be a new cancer combo treatment for women in the US with hormone positive cancer, where they can take testosterone alongside aromatase inhibitors (AIs stop the conversion of testosterone to oestrogen) to help combat the side effects of the AIs, joint pain, brain fog etc.