After cleansing at night, at the moisturizer step, take a pea-sized amount and apply it to the area with wrinkles. Let it absorb.
Retinol usage guide
If using for the first time, start with a small pea-sized amount and use every other day if the irritation occurs. If there is no irritation, you may use it every day. As it contains highly concentrated Retinol, symptoms such as skin stinging, redness, and flakiness may occur. These reactions are normal and will fade over time, but if irritation persists, reduce frequency or discontinue use.