How to layer skin products like a derm! First, cleanse. Second, use toner if using one (totally optional!). Third, I typically recommend using RX product in this step for max efficacy & absorption. 4. Any serums. However, if you are easily irritated by retinoid, you can use serum in step 3 then RX retinoid in step 4 like a sandwich method. 5. Rich creams/moisturizers. In general, try to use lighter texture products first and then richer creams last. #drheejink #drkohskincare #dermatologist #boardcertifieddermatologist #skindoctor #skincaretips #kbeautyskincare