The 111SKIN Black Diamond Serum is a potent treatment that visibly defines the facial contours. Infused with the brands signature Black Diamond Technology, the serum works over time to create a collagen-rich illusion. n 111SKINs proprietary NAC Y Complex works synergistically with NovoRetin, a plant-derived alternative to retinol, to help improve the appearance of skin elasticity. This firming effect is amplified by a powerful microalgae extract. n A true multitasker, the formula works simultaneously to lessen the appearance of age spots, fine lines and texture. Incorporate the serum into your daily beauty regime for skin that looks smoother and tighter.