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>Wine is not safe because the yeast used in fermenting the wine may contain
>gluten.  Best to take grape juice unless you know the brand of wine used is
>GF.

This must be a misunderstanding. The yeast that ferments wine grows
naturally on the grapes, it is not added by the vintner. During the
prohibition people bought grape juice, which had all its yeast bacteria
killed by pasteurization, and made wine by adding sugar and yeast, but this
is not a respectable way of making wine.

Sylvia in Ithaca, NY