What it is: A visibly brightening and firming serum with 12-hour time-release vitamin C and ferulic acid that target hyperpigmentation and reduce the look of post-acne marks.Skin Type: Normal, Dry, Combination, and Oily Skincare Concerns: Dark Spots, Dullness, and Uneven Skin ToneFormulation: SerumHighlighted Ingredients:- 12-Hour Time-Release Vitamin C: Visibly brightens all day for rapid results.- Ferulic Acid and Vitamin-C-Rich Japanese Plum: Visibly firm and support elasticity while boosting antioxidant protection.- Pro-Glutathione Antioxidant Booster: Targets hyperpigmentation and delivers 13 times more antioxidant power to visibly brighten.What Else You Need to Know: To optimize absorption, Tatcha used a stable, time-release vitamin C that visibly brightens all day. Effective yet kind to skin, The Brightening Serum may be applied morning and night for around-the-clock care for rapid results. Ultra-light and non-sticky, this serum absorbs quickly and layers beautifully under skincare and makeup.Clinical Results: In on a clinical study of 18 panelists:- 100% showed brighter and visibly firmer skin in 1 week- 100% showed improvement in post-acne marks in 1 week- 100% agreed the serum absorbs quickly into skin and is gentle Clean at SephoraOur commitment to offering formulas that go beyond regulatory standards to avoid controversial ingredients without sacrificing effectiveness.