The Science of Getting Old Infographic. In the cell-division process, telomeres keep DNA and RNA from becoming damaged. If you’re in your 30’s, chances are you’re getting grey hair. This is due to the wearing out of melanin in the body. Your body also starts slowing down its process of creating collagen, which leads to wrinkles. From the time you’re 20, your body creates 1% less collagen every year. In 2007, 174,290 collagen injections were given to those striving to reduce wrinkles.