How to use Retinol-based product:
1. Before you use it on your face, please apply it on the inside area of your arm (soft skin area) and test for irritation before using it on your face.
2. Retinol products require a skin adaptation period, so it is recommended to use them twice a week for the first time, and if there is nothing special, it can be used every day from three weeks later.
3. It is not recommended to use it on the day that your skin is especially sensitive.
4. Do not use when your skin is too sensitive.
5. Pregnant women and lactating women is not recommended to use this product.







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