I have used Ginseng Serum for about 7 days consistently and already noticed that my skin has become clear, smooth, and completely acne free. I tried numerous skin care products geared towards sensitive, oily, acne-prone skin which unfortunately haven't changed my complexion. It's slightly thicker and sticky than other serums and only 4 drops on the face are needed. The only other product that works well for me is tea tree oil/serum, but I may switch over to this serum for good!