Q&A: Does allantoin work as a barrier ingredient in water-only formulas? (Updated September 23, 2023)

I’m editing this post to remove the word “occlusive” referring specifically to allantoin as someone who thinks they’re anonymous – but doesn’t realize we have an activity log on the site 😝 – has written a diatribe to my friend Michele about how I’m wrong, which has been “happening more often lately” and that I…

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