Heh. The label on my toothpaste says "wirkt natürlich".
There's two ways to read that:
1. read "natürlich" an an adverb - now the phrase means "works naturally" (i.e. without additives, I guess?)
2. "wirkt" can also mean "appears/seems", so another valid translation is "appears natural". Probably not what they're going for, but certainly funnier.
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