Polynucleotides are chains of nucleotides, which are essentially the building blocks that make up DNA. DNA controls many important bodily functions, including how the skin develops. When polynucleotide chains are introduced to the skin (through multiple small injections), they help damaged DNA cells in the skin to repair and as a result, the cells function better. For instance, polynucleotides stimulate fibroblast cells, which help form connective tissues like collagen and elastin – the essential proteins that provide the skin with shape, volume, and a youthful appearance.