An anti-aging and brightening serum with 20 percent THD ascorbate—a mega-potent, ultra-stable ingredient 50 times more powerful than traditional vitamin C. Skin Type: Normal, Dry, Combination, Oily, and Sensitive Skincare Concerns: Dark Spots, Fine Lines and Wrinkles, and Dullness Formulation: Lightweight Serum Highlighted Ingredients: - THD Ascorbate 20%: Ultra-stable scientific breakthrough form of vitamin C that is 50 times more powerful than traditional vitamin C. - Vitamin E 3% and Ferulic