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According to Bellasugar.com, you should follow the guideline listed below for your expiration deadlines:
Mascara: 3 months
Oil-Free Foundation: One Year
Cream Foundation: One Year
Concealer: 12-18 Months
Powder: 18 Months
Blush & Bronzer: 18 Months
Cream Blush: 12-18 Months
Eye shadow: 18 Months
Eyeliner: 18 Months
Liquid Eyeliner: Six Months
Lipstick/Lip Gloss: 18 Months
Lipliner: One Year
Nail Polish: One Year
Also check out TheBudgetFashionista.com and Bellasugar.com for more on makeup expiration.
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