Melano CC Medicated Stain Concentration Prevention Premium Serum is a Japanese whitening essence by Rohto Pharmaceutical. This 20ml serum features a unique formulation with pure Vitamin C (ascorbic acid) and three types of Vitamin C derivatives for enhanced skin penetration. The thick, concentrated formula targets dark spots, hyperpigmentation, and acne marks while preventing new spots by suppressing melanin production. It also contains Vitamin B6, allantoin, and antibacterial ingredients for acne prevention. Best suited for those concerned with dark spots, uneven skin tone, and acne-prone skin.