I've recently started HRT (3 months ago), and have been using injectibles without Spiro. I feel like around a year ago there has been some slight thinning in my hair and I would want to make sure that it grows back thick again. I'm wondering if using finasteride on top of estradiol, or adding spiro to the mix (the reason I don't use spiro is that my testosterone levels are already quite low) would be beneficial for my hair? Or does estradiol already cover the benefits of fin?