Brand from South Korea: COSRX. Benefits: A serum that infused with retinol derivatives to breathe life into tired, dull skin. Fortified with calendula extract to soothe and offset any side effects. 0.5% of stabilized Retinyl palmitate (vitamin A derivative) works to refine uneven skin texture. Treats signs of sun damage, wrinkles, and surface imperfections such as hyperpigmentation and scarring. Soothes and calms the skin to minimize the possibility of stimulation. How to use: Prep the skin with toner, and apply a moderate amount of serum to the face. – Use SPF protection during the day. – Do not use together with other products that contain acids like AHAs and BHAs.