Anonymous
i know people say to throw out old makeup every so often but i use it until it doesnt work anymore. eyeshadow lasts until it runs out so you can keep using it as long as it lasts.
Lava
Till it's gone, if you clean your brushes regularly it's going to take a long time for dry makeup to go bad.
Carlie
about 6 months to a year or if it is one I really like I'll use it till it is gone.