As for sebum control, it's quite unique. For my oily skin, it was a little difficult to tell the difference at first, but over time, it turned out to be really glowing and hydrating. As long as you're indoors and with minimal physical activity, it's very safe.
To treat acne honestly on my skin, it took a long time to work, but it took me a long time maybe because I was expecting it to be fast, and this serum is quite helpful in preventing acne so it doesn't come often, with a note that you are diligent in skincare and a well-maintained lifestyle.
I dont think it has bad side, but maybe we just have to be careful for the AM use to control how much we use the product, because if it's over we'll find the skin looked more oily and not that glowing.
