[daviross]

I've run into a variant of this: Beer. Citrus is a popular adjunct flavoring for IPAs and other hopped beers. Sometimes it's obvious, a grapefruit shandy is going to have grapefruit in it; but I've also had beers labeled something like Orange Citra Juice Bomb where down in the ingredients it notes that the citrus flavor is boosted by grapefruit, but I didn't catch that.

Now, that's partially on me for not scrutinizing the ingredients, but also *beer doesn't have to list ingredients*. So it's entirely possible to have a beer containing a significant amount of grapefruit without any indication of it on the label. And that can be life-threatening, depending on the medication in question.

So that's something where I'd definitely appreciate a standard of noting grapefruit if it's in a food. Activated charcoal similarly.