Acid mantle? Oh yeah, I'll be looking that up ASAP.
Why do I care about all of this? Why not just buy the latest products and trust the manufacturers to get what my skin needs right?
Because I've been "blessed" with sensitive (read "angry") skin. It takes very little for my skin to flare up in crazy, chaotic and painful ways.
I'm 34 years old. I've tried it all, I've done and used it all. I've tweaked my routine so many times hoping for a working combination that I've just given up hope that manufacturers will magically nail what my skin needs down.
So I'm learning the science behind good skin and am going to come at getting good skin more educated about what good skin needs to be healthy. Follow along for more info in the future.