All Day Vitamin Brightening & Balancing Facial Serum contains 86.14% Vitamin Tree Extract (Sea Buckhorn), various vitamins such as A, B, C, D, E, and K, and 2% Niacinamide. It feels lightweight and hydrating. It's a gentle option for those new to Vitamin C. Key ingredients include Cica, Hyaluronic Acid, and Chamomile Extract. It gives a nice glow and doesn't irritate my skin.