Yep, retarded it is, then.
There are plenty of racks out there built on nothing but herbs. I'm actually not much further from having one. Breast Nexum (with an m) is where you can go and see lots of Y-chromosomed people's tits in various stages of development, usually with minimal if any traditional HRT involved.
But yeah, it might as well be voodoo, because apparently an inert substance would cause the same tits to spring forth when coupled with the power of belief. Natives using willow bark or evergreens for pain relief? Why, the fools might as well be PRAYING TO GOD!!1!1!11!!! HAAAAAHAHAHAHAhahahAHAHhahahhaaahahaaaa
YOU PUNY HUMANS STILL DON'T REALIZE THE OMNIPOTENCE OF WESTERN MEDICINE!!! NOTHING COULD POSSIBLY HAVE ANY SORT OF EFFECT UNLESS THE MEDICAL JOURNALS SAY SO!!!!
Ooooooooooooooor, you could do some research beyond The Lancet before you come here in an acknowledged and proven position of ignorance making retarded assertions as to what works and what doesn't.
Now, if you want some advice other than "fucking pull your fucking head fucking out of your fucking ass if you're fucking serious about this", hormones (including herbal hormones that may or may not meet your personal standard of peer-reviewedness) seems like a drastic step to "stall... thinning hair and keep some chance of this alive." Hair would probably be better served with Rogaine rather than xenoestrogens. I'm not quite sure if you sound not quite sure if HRT is something you really want. If you aren't sure, that's DEFINITELY something to figure out before you try to load up "for my hair and, you know, just in case." If you are sure you want it, then nut up and talk to your doctor, do some therapy, and get it done pharmaceutically; or nut up and open your mind, do some research, and get it done herbally. Just do it right if you're gonna do it, or not at all. Half-assing it is a great way to end up causing harm to yourself, besides looking like "Bitch-Tits" Bob.