Cosmetic Science/Solvents and Solutions
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![](//upload.wikimedia.org/wikipedia/commons/thumb/6/68/Cell_Culture_in_a_tiny_Petri_dish.jpg/220px-Cell_Culture_in_a_tiny_Petri_dish.jpg)
In vitro testing uses cell cultures.
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Cell_Culture_in_a_tiny_Petri_dish.jpg/220px-Cell_Culture_in_a_tiny_Petri_dish.jpg)
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