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HOW DO I KNOW IF MY RETINOL PRODUCT IS OXIDIZED AND NO LONGER WORKING?Updated 6 months ago

Retinols will naturally oxidize over time; however, all of our formulas have been tested to remain stable and intact for 24 months with our accelerated stability testing we perform. With that being said, they are all safe to use and efficacious until they turn brown. The range of color presented is definitely within the acceptable range. 

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