How to Apply Retinol or RX Retinoids like a Dermatologist! 1. Pea-sized amount to the whole face 2 Try dividing the face into 5 parts for application 3. Always follow with a moisturizer to reduce irritation 4. Start by using 2 nights per week 5. Can apply on neck if not irritating #retinolskincare #retinoidproducts #retinoid #retinoltips #skingoals #drheejink #drkohskincare #boardcertifieddermatologist #skindoctor #koreandoctor #koreanskincare