I just bought it. It does not state the percentage of retinol.. It is the first time I am using retinol. I am 28 with normal skin, first wrinkles on the forehead, and occasionally get a pimple. Since I plan to gradually use retinol, starting with only 1-2 times a week in my evening skincare routine, for now I have only applied it once. I combined it by applying hyaluronic acid serum before, followed by retinol, and then cicaplast on top, as I have read that it is recommended after using retinol. And of course, SPF 50 sunscreen every morning without exception. For the first use, it did not cause any irritation, nice texture, gentle scent, I am satisfied, I still need to see the results in the future. I will continue gradually until I incorporate it 3-4 times a week, and once I have a better opinion, I will come back.
Update: I have already used it 4-5 times within a period of 2.5 weeks. Everything is good. I did not have any irritation, I am satisfied. It definitely needs moisturizer once the retinol is absorbed because it leaves the skin completely dry. The only thing I noticed is that I feel some small tingling sensations on my face at random times during the day, even if I did not apply retinol the previous night. But I assume it is normal due to the action of retinol. Other than that, I will come back.