Surprisingly Mild and caused no irritation!
My face is used to exfoliants but lately with another product, I really experienced disruption of my skin barrier. I was kinda skeptic using this but tried to take the plunge and surprisingly, no irritation but of course that tingling effect when initially placed. This coupled with the Triple Active Serum is a game changer!
Stings a bit especially on my first try my skin eventually got used to it.