It just occurred to me, that people might not know about transfeminine science:
https://transfemscience.org/articles/
They do a lot of literature reviews on trans fem hrt, help distill things down. I do recommend caution, they've got a lot to say about the safety profile of cyproterone and the efficacy (or lack) of spiro. But the article on estrogen absorption and half life are much less terrifying.
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