DS Laboratories Spectral DNC N Density Serum 60mlSpectral. DNC N is the first clinically tested topical serum to employ 5% Nanoxidil, a powerful new alternative to traditional products, with high efficacy and lower molecular weight for better absorption. Our unique formula, developed and recommended by top dermatologists, is encapsulated in our proprietary Nanosome Delivery System. It helps strengthen roots and increases the appearance of hair density, thickness, and volume. The powerful ingredients