How Long Will You Live? is an Irish television series broadcast on RTÉ One. Presented by Mark Hamilton, it has so far run for a total of four series. Each week Hamilton examines a different individual with an unhealthy lifestyle, estimates their lifespan and attempts to increase that lifespan by implementing his own techniques into a plan to improve that person's lifestyle. The fourth series began airing on 7 January 2009. The series is sponsored by Flora.
