For transfeminine folks, too much estrogen can be a bad thing. This is because estrogen and testosterone can be converted between each other in the body. Too much estrogen can lead to more testosterone.

hey there, I was hoping you could edit your comment to remove this misinformation, only testostetrone can be converted to estrogen through aromatization (basically this enzyme aromatase converts the excess T into E). Excess estrogen does not convert to testosterone in the body.

here’s a chart showing the sex steroid pathways: https://en.wikipedia.org/wiki/Sex_hormone#/media/File:Steroidogenesis.svg

Notice testosterone can convert to DHT (Dihydrotestosterone, which causes baldness), and estradiol (estrogen), but there is no pathway from estradiol back to testosterone.