Congratulations, Chik, that's really cool.
Re the sake and hangovers, has that got something to do with the degree of polish of the rice?
Hangovers are of some interest to me: I cause them but I don't get them. This has something to do with relative activity of alcohol dehydrogenase and acetaldehyde dehydrogenase. Recent research has indicated that the latter is implicated in "red wine headache" (which I do get occasionally). It seems that quercetin, formed in grape skins in sunny conditions, inhibits one of the acetaldehyde dehydrogenases.
https://www.nature.com/articles/s41598-023-46203-y
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