My skin is super sensitive & acne prone (the worst). I've tried countless retinoids or retinol products from my dermatologist and this is the only one that actually works wonder for me. It makes my skin feel super smooth, bright and refreshed, and it also helps brighten my hyperpigmentation concerns. It did not cause any irritation, redness, and flaking like all the other products I have tried! The first night I used it, the next morning my skin looked amazing. It was brighter, smoother, my fine lines looked less noticeable, skin tone was even, my makeup looked amazing the whole day! I can already see a massive difference in my skin after just a week of use. This product has the most powerful and immediate results I've ever seen! In fact, it made my skin look so good that I may not have to wear foundation anymore. Thank you Ling Skincare for formulating the most proven results skin care products on the market!