Abbreviation for deoxyribonucleic acid. DNA is found in all cells. It is the primary component of genes—and genes are the means by which cells transmit hereditary characteristics. DNA is the basis for all genetic structure; its components include adenine (A), guanine (G), thymine (T), and cytostine (C). It is the mapping of these substances that makes up the genetic code of all human traits and cellular functions. DNA is also the genetic material that is required for all cellular division and growth. Including DNA in a skin-care product is pointless because it cannot in and of itself affect a cell's genetic elements. The formation of DNA is a complex process within the cell that requires a multitude of proteins and enzymes for it to have an effect on the body's genetic material. It is also doubtful that you would want to ever put anything on your skin that could affect genetic material, particularly via a cosmetic for which there are no safety or efficacy regulations. Beyond that, any successful attempt to affect what DNA does would potentially create a signifcant risk of cancer.