First of all, let's talk about serum. What are serums & do I really need them? Serums are usually smaller in bottles (around 50ml), packed with higher concentrations of active ingredients to target certain skin concerns such as pigmentations, wrinkles, redness. Serum's textures are usually runny & more viscous than a typical watery toner but… Continue reading One Brand Review – Beauty of Joseon Serum