We all want to stay healthy as we age but, with so many different claims out there, it can be hard to know the best advice to follow. In How Not to Age, Dr Michael Greger digs into the top peer-reviewed anti-ageing research to deliver a complete and optimal guide with simple steps to extend your lifespan and slow the adverse effects of ageing.

Inspired by the dietary and lifestyle patterns of the world's centenarians and residents of 'blue zone' regions where people live the longest, Dr Greger presents easy, evidence-based ways to preserve the body functions that keep us feeling youthful, both physically and mentally.

Can an apple a day really keep the doctor away? What's better for your longevity, jogging for four hours or eating two handfuls of nuts twice a week?