COSRX - lunabellarina review for The Vitamin C23 Serum

This highly concentrated pure vitamin C formula is contained in a specialized bottle that allows it to expel gas whilst blocking the inward flow of oxygen. There's a small popping sound and a whiff of corned beef scent once opened, which kinda surprised me 😆 It has a double-layer structure with oil layer on top to maintain freshness and delay oxidation. The texture of the serum feels very silky though it does leave a slight filmy, tacky finish before fully absorbed into skin. When I first apply this to my skin, it leaves a mild stinging sensation on my cheeks, though it only lasted for a few seconds. So I avoid applying this on certain dry spots on my skin and only apply it at night. I also layer my toners for better hydration before using this. So far it hasn't caused me any breakouts though I still experienced the occasional stinging sensation.