How to Make Your Retinol Stable

There are different ways that you can make your retinol stable, right? One is packaging, the other one is the formulation itself. And then one thing I like to look at is, does the product change color over time? So there may be a little beige pale yellow as you open their tube and a week later, it looks significantly more orange or yellow around that opening. That is a sign that maybe it was stable in their tube, but now that you've opened it and you've exposed it to oxygen, it is actually starting to degrade.

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