Testing may kill animals needlessly - Washington Post- msnbc.com - 0 views
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American doctors inject more than 3 million doses of Botox to temporarily smooth their patients' wrinkles and frown lines. But before each batch is shipped, the manufacturer puts it through one of the oldest and most controversial animal tests available.
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check the potency
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injects mice with Botox until it finds a dose at which half of the animals die
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