While an existential fear of death is nothing new, and nor are claims to conquer mortality with elixirs or holy grails, extending your lifespan is no longer an aspiration dependent on following a disciplined diet and exercise regime alone. Nowadays, there is also an increasingly expansive menu of biohacks purported to boost health, offered at self-styled “longevity clinics”. Rather than being confined to Hollywood and the uber-rich, such clinics are beginning to proliferate among the affluent mainstream. Conduct an online search for longevity and, in the UK alone, there are numerous results for longevity services or longevity medicine.