I recall an Asimov character whose religious dietary restrictions forbade all foods produced from living things; they could eat only synthetic foods. At some point in the story, that character faced the dilemma of violating the dietary law or starving.
I recall the character in association with the Alphans, which a web search reminds me are the people of a world in the Foundation series, but that could be a false lead that made my web searching futile.
Who was that character? Someone from a robot story, the Foundation series, or some other science fiction? How did the character resolve the religious dilemma? Am I so far mixed up that it wasn't even an Asimov character?