I have sun spots for years, so I do not expect instant results. The serum is absorbed instantly, very nice product. I use it at night and I could see my skin with better skin tone the next morning. Now 2 weeks have passed, my skin is fresh looking. Sun spots are still there but the small ones seem less noticable. I am going to use it in the morning & at night and put extra serum on those big spots. I believe it will work! :D