How fasting boosted my immune system but didnt help me play the didgeridoo on September 21, 2016I am at London’s Heathrow airport, and have just checked in for an eleven hour flight to Sao Paolo, Brazil, when I spot something out of the corner of my eye. My doctor, Dr Dermot O’Flynn, is coming towards me, an enormously long cardboard box, barely fitting on his trolley. I stare at the box […]