Vanilla flavouring is sometimes made from something called castoreum, a scented oil which is naturally secreted by beavers’ butts.
100 Mind-Blowing Flavouring Facts
Artificial banana flavouring is based on an extinct banana. You may notice that your banana-flavoured food products don’t taste quite like the real thing. This is because the commercially used banana flavouring is based on a type of banana that was wiped out by a plague in the 1950s.
Vanilla flavouring is sometimes made with a liquid secreted from beavers’ castor glands.