My skin is very dry, perhaps because of the air conditioner. Is a skin booster good?

Hello

Are you all taking good care of your skin these days?

It’s scorching hot outside because it’s summer, but since I’ve been running the air conditioner indoors all day, my skin is a complete mess. The surface is shiny with oil, but underneath it feels like it’s going to crack, and white flakes of dead skin are even popping up.

It’s not just crisp on the outside and moist on the inside; it feels like my skin barrier has completely collapsed. I looked up the characteristics of dehydrated oily skin online, and it felt exactly like my story. No matter how much moisturizer I apply, it just sits on the surface and doesn't fix the tightness deep inside. In a situation like this, what do you think is the most effective skin booster to fully replenish moisture deep within the skin?

I’ve heard from people around me that Rejuran Healer is good, so I’m really curious if the effect is definitely worth the pain!