Living to 100 today is not unheard of, but is still rare. In America and Britain centenarians make up around 0.03% of the population. Should the latest efforts to prolong life reach their potential, living to see your 100th birthday could become the norm; making it to 120 could become a perfectly reasonable aspiration.
More exciting still, those extra years would be healthy. What progress has been made in expanding lifespans has so far come by countering the causes of death, especially infectious disease. The process of ageing itself, with its attendant ills such as dementia, has not yet been slowed. This time, that is the intention.
The idea, as we set out in our Technology Quarterly, is to manipulate biological processes associated with ageing that, when dampened in laboratory animals, seem to extend their lives. Some of these are familiar, such as severely restricting the number of calories an animal consumes as part of an otherwise balanced diet. Living such a calorie-restricted life is too much to ask of most people; but drugs that affect the relevant biological pathways appear to bring similar results. One is metformin, which has been approved for use against type-2 diabetes; another is rapamycin, an immunosuppressant used in organ transplants. Early adopters are starting to take these drugs “off label”, off their own bat or by signing what amount to servicing contracts with a new class of longevity firms.
Living to 120 is becoming an imaginable prospect. Excitingly, those extra years would be healthy—but there would be wide ramifications https://t.co/zuz1aKqGEN pic.twitter.com/kWzEk2QBrh
— The Economist (@TheEconomist) September 28, 2023