@kristingl: You've heard of retinol, but what about retinal? It's suitable for sensitive skin and is known to work 11 times faster than retinol! The reason being it takes one step to convert into retinoic acid, the form of vitamin A skin needs. The Seoul 1988 Serum is one of the few products I've seen that incorporates retinal. If you've been wanting to try retinol but are nervous about the potential irritation or you haven't had a good experience in the past, give retinal a chance! ✨ #ksecret #seoul1988 #seoul1988retinalserum #retinal #retinol #acneproneskin #acne #antiaging #kbeauty #koreanskincare @KSECRET GLOBAL