If you see an ingredients list that includes carmine, cochineal extract or natural red 4, the product contains crushed up bugs.
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Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Australian Graham Barker has been collecting his own belly button fluff every day since 1984 - keeping it in storage jars.
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Skittles and jellybeans contain crushed insect cocoons which are used to coat the candies to give them that special shine.
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In Brazil, there's a species of cockroach that eats eyelashes, usually those of young children while they are asleep.
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The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
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