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I have been using this for two weeks so far and I am impressed. I am 43 with heavy lines on my forehead that I hate. This has already made a visible difference. I use this every night after washing my face and before putting on my normal moisturizer. I did loads of research and found this to be continually in the top few best retinol products. It is totally affordable as well. I will be using this for a long, long time.