I was amused when I realized that any substance with nonzero mass is "toxic" in sufficiently large amounts (even if, say, it gets removed from your body as fast

I was amused when I realized that any substance with nonzero mass is "toxic" in sufficiently large amounts (even if, say, it gets removed from your body as fast as you ingest it): enough of it will collapse into a black hole that swallows you up.