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Propanediol.
Propanediol.
Propanediol is one of those supporting ingredients you’ll see in a lot of skincare and tanning formulas. I included it because I looked through the ingredient list and wanted everything researched and linked. It helps the formula apply smoothly so the mousse spreads more evenly.
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Pros
- +Common solvent/humectant that can help with smooth application
- +Supports an even spread in mousse formulas
Cons
- -If you’re sensitive, always patch test new formulas
