If my skin condition is somewhat decent, I try using functional products.

This is Dongkook Pharmaceutical's Centellian Melacapture Toning Shot Ampoule.

It isn't irritating, but since it has a high concentration of niacin, it feels like my skin gets red when I use it for the first time in a while.

Even though there is no stimulation on the outside or inside.

So, whenever my skin feels a bit stable, I apply this.