I don't know if i can answer your question completely but i can give you what I know. Real fermented rootbeer does have a very small amount of alcohol in it (a fraction of a percent) It isn't enough to worry about since it would take too many glasses of fermented rootbeer to amount to a single adult beverage. I don't have any experience in making alcoholic rootbeer. I don't even ferment anymore since I now have a couple of kegs and a force carbonation system.
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