According to the inquiry website, humny is a skin care product specially used to lighten spots, which contains many effective ingredients, such as vitamin C, arbutin, hyaluronic acid, pure nicotinamide and so on. These ingredients have antioxidant, whitening and freckle-reducing effects. The core component is biosynthetic pure nicotinamide, which is different from ordinary nicotinamide and extracted at high concentration, so the effect will be more effective and direct than ordinary nicotinamide.