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    • It is recommended that you start trying it on small surface on your skin. That way you'll se the reaction and can help to minimize potential side effects, such as redness and peeling.
    • Use tretinoin at night: Tretinoin can make your skin more sensitive to the sun, so it is important to apply it at night and use a sunscreen during the day. Apply a small amount of tretinoin to clean, dry skin, avoiding the eyes and mouth.
    • First month use it 2x per week, later you can use it 3x per week.
    • Remember; Ketrel tretinoin works 2-3 days after applied on your skin.
    • Don't use any other day or night creams or serums. In combination with Ketrel tretinoin, they might cause dry skin.
    • Protect your skin during the say with protection cream, or sunscreen cream (protection from wind, cold weather or sun burns).
    • Hydrate your body! Drink at least 2 liters of water. It's not enough just to use moisturize creams. Ketrel works the best if your body is well hydrate and will help to get most positive wanted effect on your skin.


        • If you are allergic to tretinoin or any of the other ingredients (listed in section 6).
        • If you are pregnant
        • If you are planning to become pregnant