SEOUL 1988 Serum: Retinal Liposome 2% + Black Ginseng

Nice retinal but not for beginners!! I've been using retinal/retinol for years now and this one I use it three times per week. It makes my skin glow, but if I use it more than this I break out! In any case I give 5 stars because used correctly, I can really see a difference in my skin.