This has been the best product I’ve found to remove discoloration and sun spots/dark marks from pimples. It goes on smooth and absorbs easily. I noticed it working within a week! I do wish there were some more natural ingredients, but overall I’ve never found a more effective solution

I used this product on a sun spot on my forehead. This lasted a long time since I only used in one area. This didn’t cause any irritation, break out, or redness. This also feels light weight which is good for my oily skin. I did see a difference in my sunspot and I wish I took some before and after photos! I am impressed! It is expensive but luckily they do sell a travel/ smaller size

I have used a whole bottle of this expensive PTR PROStrength Niacinamid Discoloration Treatment. In the ingredients list, it checks off the tyrosinase inhibitors that are needed to target melasma and sun spots. They describe it as a 15% brightening complex consisting of niacinamide, tranexamic acid, kojic acid, and alpha arbutin. I used this daily in the morning along with my vitamin C. I would use azelaic acid at night. It helped with my overall skin tone. It has lightened some of the sun spots, but they have not gone away. My pregnancy shadows on my cheeks are still there. I am moving on to other products that may be able to help. I won't be repurchasing.