But the metabolites don't seem to be good at getting past the gut as they apparently get expelled (going by what No_Hype has posted). Plus the in vitro studies have been on amentoflavones action with it being intact.Lets talk flavone bioavailability.
Most non-methylated flavones are poorly bioavailable directly.
Most non-methylated flavones will however be the benefactor of methylation during metabolism.
There are multiple studies documenting oral flavones methylated metabolites being responsible for their benefits.
Additionally, in a couple of studies, co-ingestion of a flavone with a methy transferase inhibitor eliminated the presence of the methylated metabolites, as well as the effects of the ingredient.
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I think it highly likely that Amentoflavones effects are the result of a metabolite, and not the ingredient itself.
To clarify, for it to exhibit the MOAs suggested in the studies for amentoflavone (basically all in vitro), oral administration of it does not appear to be able to do that at the doses currently being supplemented with. This is not to discount potential ergogenic benefits via other possible mechanisms (though these would of course be unknown mechanisms as there does not seem to be data for it), just that the calcium release mechanism does not appear plausible after seeing the bioavailability information that came out. Which brings to question if there is any actual acute strength gains people are reporting from the first few doses (tissue saturation could be a plausible point, but that would require build up over time from regular use).