The ageing process all starts deep inside our cells. Within our cellular structure are chromosomes, which carry our genetic makeup, and on the ends of these chromosomes are protective caps made of protein; these are called telomeres. Our telomeres shorten with age, meaning they can’t protect our chromosomes properly so our cells cannot replenish effectively. This is what impacts how we biologically age. In their book The Telomere Effect, Elissa Epel and winner of the Nobel Prize for medicine Elizabeth Blackburn say that to stop our telomeres shortening – and therefore delay diseases associated with ageing – we need to improve our lifestyle. Specifically this means managing chronic stress, exercising, eating better and getting enough sleep.