Cannot thank the Exaglow Serum S10 enough. A brown sunspot had appeared suddenly on my cheek so I went online to see which skincare brand to choose from to diminish the spot. Initially I was going to buy the Paulas Choice one however I got very confused with their product selection and also their steep price. I then found Facetheories S10 serum and thought to give it a go, and voila, within 4 days my sunspot was gone. I was ecstatic to see the results and since then have been using the Serum every other night to prevent any further sunspots. Thanks so much Facetheory for creating the right product at the right price!