• A slight tingling sensation can be expected, due to the nature of pure vitamin C.
• It is a natural phenomenon caused by the difference in the pH level of the skin and vitamin C.
• For sensitive skin, it is recommended to use a toner and moisturizer immediately after applying vitamin C.
• You can use this product during the day, however, during the day, we suggest applying sunscreen on top of Vitamin C.
• Do not use this product together with exfoliating chemical ingredients like AHA, BHA, Retinol.
• If you have sensitive skin, it is recommended to apply a smaller amount first and adjust the application amount gradually.

Country of Origin: Korea.