ITT: people who don't understand science allowing themselves to be manipulated by suggestive article titles and long science words.
Because of the way that DNA replicates when your cells are dividing, 10 base pairs (enough DNA to code for three amino acids, and the shorter proteins are made up of 200 base pairs) are lost every time a cell divides. However, since every amino acid in a protein is vital, on the end of DNA strands there are things called telomeres, which are essentially strands of DNA that don't code for anything; they're just random base pairs, essentially, that pad DNA so that important protein information isn't lost.
Your telomeres will typically run out in your late seventies, early eighties, and at that point your body will start making certain proteins incorrectly. This leads to a medical condition commonly referred to as death.