I can't believe I found this paper on the relationship between dietary fiber and plasma levels of testosterone and estradiol.

https://academic.oup.com/ajcn/artic...2/1/127/4691587

Spoiler: The more fiber, the lower those hormones. See the last sentence in the abstract:
Lemme give you a very different implication, from the comfort of my chair right here. Men become less manly. Women become less womanly. Now start this process at a young age and continue throughout one's lifetime.

So, how much fiber is that fancy new food guide telling us to eat again? Paper published 1985. I've never heard anything of the sort from anybody anywhere ever. Ever. It's news to me and I'm pretty sure it's news to everybody else on this forum.