He endures freezing temperatures, downs bulletproof coffee and consumes a pharmacy-worth of pills on a daily basis - Ben Zand meets the self-proclaimed ‘biohacker’ who wants to ‘live forever’. In the pursuit of becoming immortal, Leon spends more than the average UK salary on using cryochamers, bulking in the gym and prolonged periods of fasting - all to live to 3,000 - but is it worth it?