So Homer Simpson was right in the end.

Beer is basically fermented sugar (well, glucose converted to ethanol by yeast, for the most part; though its maltose first, yeast, bacteria etc... prefer glucose and maltose is a disaccharide of glucose: Maltose).

Pretty sure Duff was a heavily filtered macro beer.

Not saying engineered beer is necessarily bad- Sapporo and Asahi never disappoint- but I imagine you would want to stick to unfiltered and unpasteurized to retain some of the more… alive compounds.

No beer has nothing to do with Roseburia genus bacteria

>So Homer Simpson was right in the end.

Indeed. Proof that beer builds gut strength: <https://www.youtube.com/watch?v=OrrEzyKXUnk>