1. Apply after cleansing and toning.
Use 2~3 drops and smooth in gently all over face.
(Especially smooth intensively the aged area such as pigmented or wrinkled lesions)
2. Initially a slight tingling may be experienced.
(a passing phenomenon)
3. Mixing with several drops of vitamin C20 and toner makes your skin refresh without being gooey.
4. After applying vitamin source C20, apply moisturizer is more effective.