I tried cheaper Vitamin C products trying to avoid spending $80 on a day serum but finally purchased this product and it will now be a permanent product in my morning routine. It has been the only OTC product to help fade my acne scars and melasma. I use a dime-size amount of product every morning on clean, dry skin. You must use with an SPF (but, you should already use an SPF so....). If you have sensitive skin I'd start slowly to ensure this formulation doesn't irritate skin (perhaps every other day application?). You will notice brighter skin within approximately 2 weeks.
For Millie's Summer 2020 issue, we talked to a celebrity makeup artist about her favorite products—that get the job done in real time, under hot lights, for top talent. She said that because there are so many different serums on the market, it's best to shop based on your skin type and concerns. Most people can get a skin-brightening boost from vitamin C, a powerful antioxidant that fights pollution and aging free radicals.