I read about arbutin and tranexam acid and wanted to try them for my hyperpigmentation caused by acne. I have a prominent, dime-sized mark on my cheek from over exfoliating with a clairsonic-like device. After 3 uses over 2 days, it lightened significantly. Someone on this site mentioned their hyperpigmentation scar mildly crusting over before going away while using tranexam acid. I experienced this. It was kind of weird but is didn't hurt. It probably was only noticable to me. My skin looks great!
Perfect for oily to dry skin, you can see the difference in just a few weeks