These were the only references to “butyrate” I could find in the post-Androgen Deprivation hypothesis paper:
[Concerning substances claimed to have a noteworthy positive or negative effect on this site]
These have included zinc, quercetin, resveratrol, milk thistle, licorice root, turmeric/curcumin, sulforaphane, DIM, sodium butyrate, saw palmetto, tribulus terrestris, polyphenol rich products such as cacao nibs or pomegranate, and soy and soy isoflavones including genistein, all of which are notably antiandrogenic through various mechanisms
Sodium butyrate, a histone deacyletase inhibitor capable of modulating AR expression (Paskova et al., 2013), showed improvement in motor deficits and histopathological impairment of neurons and muscle within an narrow optimum dose window in transgenic mice (Minamiyama, 2004).
…and it matches a draft of the paper I had from right before it was published on this site.
Hopefully no one is taking these observations as recommendations?