Advice on healthy living generally takes one of two forms. There is the unaffordable Gwyneth Paltrow route of nauseating smugness, where you sit in the Hamptons knitting your own kale while wearing a £1,200 organic cashmere sweater. Then there is the unsustainable “never eat another carb and go to the gym for three hours a day” route. Into the gap drops neatly a man called Dalton Wong.