very good for acne that are penetrated deep in the skin and it is really moisturising. as the product has high concentration i used it only once a day after cleansing on my nighttime skincare routine

This product was okay. I didn't used it that much because I realized that I didn't have a lot of blackheads. If I did have blackheads, I'm 100% sure that this product will work well. COSRX is a great brand for acne and I trust their products. Overall, their products are great. 

I have been using this every morning for the last two months and i am not exactly sure if this is doing anything. I use this after toner and before essence. Maybe it will be better to use this in summer for sebum control?