"Consumers tend to be very pleased with this serum's ability to reduce brown and red spots, all while promoting a luminous glow," explains Dr. Channing. "For best results, use this serum after washing your face in the morning, and then feel free to add in other products afterward." She adds that the serum works well under makeup, moisturizer, or sunscreen products, making it a great multitasking product to incorporate into your daily routine.